unified: Use fromSource() in the test.

Author: geoffw0

unified/ql/test/library-tests/string-literals/test.ql

@@ -1,5 +1,5 @@
 import unified
 
 from VariableDeclaration decl
-where decl.getFile().getRelativePath() = "test.swift"
+where decl.getFile().fromSource()
 select decl.getPattern(), concat(decl.getValue().getStringValue())