build(wamr): fix target selection

[casaroli]

Allow building for ARM(32) and MIPS platform.

[casaroli]

Filename                                                         Regions    Missed Regions     Cover   Functions  Missed Functions  Executed       Lines      Missed Lines     Cover    Branches   Missed Branches     Cover
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
ocre/context.c                                                       375               155    58.67%          10                 0   100.00%         291                80    72.51%         190                95    50.00%
ocre/container.c                                                     709               381    46.26%          15                 0   100.00%         495               197    60.20%         360               223    38.06%
ocre/util/unique_random_id.c                                          21                 4    80.95%           3                 0   100.00%          29                 6    79.31%          12                 4    66.67%
ocre/util/string_array.c                                              39                18    53.85%           4                 0   100.00%          53                27    49.06%          24                14    41.67%
ocre/util/rm_rf.c                                                     66                15    77.27%           4                 0   100.00%         114                42    63.16%          44                16    63.64%
ocre/ocre.c                                                          451               191    57.65%           9                 0   100.00%         291                91    68.73%         226               131    42.04%
runtime/wamr-wasip1/wamr.c                                           298               183    38.59%           7                 0   100.00%         282               135    52.13%         162               111    31.48%
runtime/wamr-wasip1/ocre_api/core/core_mutex.c                         7                 4    42.86%           4                 3    25.00%          14                10    28.57%           2                 1    50.00%
runtime/wamr-wasip1/ocre_api/core/core_memory.c                        2                 0   100.00%           2                 0   100.00%           6                 0   100.00%           0                 0         -
runtime/wamr-wasip1/ocre_api/core/core_timer.c                        24                24     0.00%           5                 5     0.00%          43                43     0.00%          14                14     0.00%
runtime/wamr-wasip1/ocre_api/core/core_eventq.c                       19                10    47.37%           5                 2    60.00%          57                30    47.37%          10                 6    40.00%
runtime/wamr-wasip1/ocre_api/core/core_misc.c                          3                 2    33.33%           3                 2    33.33%          13                 8    38.46%           0                 0         -
runtime/wamr-wasip1/ocre_api/ocre_api.c                               18                18     0.00%           2                 2     0.00%          25                25     0.00%           6                 6     0.00%
runtime/wamr-wasip1/ocre_api/ocre_common.c                           245               163    33.47%          13                 5    61.54%         220               147    33.18%         134               107    20.15%
runtime/wamr-wasip1/ocre_api/ocre_messaging/ocre_messaging.c         225               225     0.00%           5                 5     0.00%         182               182     0.00%         118               118     0.00%
runtime/wamr-wasip1/ocre_api/ocre_timers/ocre_timer.c                272               245     9.93%           8                 6    25.00%         170               154     9.41%         146               137     6.16%
runtime/wamr-wasip1/ocre_api/utils/strlcat.c                          12                12     0.00%           1                 1     0.00%          21                21     0.00%          10                10     0.00%
common/common.c                                                       23                 1    95.65%           1                 0   100.00%          16                 2    87.50%          14                 2    85.71%
platform/posix/lstat.c                                                 1                 0   100.00%           1                 0   100.00%           3                 0   100.00%           0                 0         -
platform/posix/file_mmap.c                                            78                53    32.05%           2                 0   100.00%          61                37    39.34%          38                27    28.95%
platform/posix/memory.c                                                3                 0   100.00%           3                 0   100.00%           9                 0   100.00%           0                 0         -

Files which contain no functions:
uthash/include/uthash/utlist.h                                         0                 0         -           0                 0         -           0                 0         -           0                 0         -
runtime/wamr-wasip1/ocre_api/core/core_internal.h                      0                 0         -           0                 0         -           0                 0         -           0                 0         -
runtime/wamr-wasip1/ocre_api/ocre_api.h                                0                 0         -           0                 0         -           0                 0         -           0                 0         -
platform/posix/include/ocre/platform/log.h                             0                 0         -           0                 0         -           0                 0         -           0                 0         -
platform/posix/include/ocre/platform/config.h                          0                 0         -           0                 0         -           0                 0         -           0                 0         -
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
TOTAL                                                               2891              1704    41.06%         107                31    71.03%        2395              1237    48.35%        1510              1022    32.32%