Investigate why jdk21u Mac Rebuild_Same_JDK_Reproducibility_Test_0 is not 100%

[andrew-m-leonard]

See: https://ci.adoptium.net/view/Test_grinder/job/Grinder/11167/console

18:26:59  Files src_jdk/Contents/Home/lib/libattach.dylib and tar_jdk/Contents/Home/lib/libattach.dylib differ
18:26:59  Files src_jdk/Contents/Home/lib/libawt.dylib and tar_jdk/Contents/Home/lib/libawt.dylib differ
18:26:59  Files src_jdk/Contents/Home/lib/libawt_lwawt.dylib and tar_jdk/Contents/Home/lib/libawt_lwawt.dylib differ
18:26:59  Files src_jdk/Contents/Home/lib/libdt_socket.dylib and tar_jdk/Contents/Home/lib/libdt_socket.dylib differ
x150...
18:26:59  Files src_jdk/Contents/Home/lib/modules_extracted/java.base/jdk/internal/module/SystemModules$1.class and tar_jdk/Contents/Home/lib/modules_extracted/java.base/jdk/internal/module/SystemModules$1.class differ
18:26:59  Files src_jdk/Contents/Home/lib/modules_extracted/java.base/jdk/internal/module/SystemModules$2.class and tar_jdk/Contents/Home/lib/modules_extracted/java.base/jdk/internal/module/SystemModules$2.class differ
...

Suspect the dylib differences is caused by this: #2979

SystemModules*.class not sure about....??