Add t/library/*/*.t to list of globs included in \@library_tests, hen…

…ce run during 'make test'.

lib/Parrot/Harness/DefaultTests.pm

@@ -89,6 +89,7 @@ our @EXPORT_OK = qw(
     t/dynoplibs/*.t
     t/dynpmc/*.t
     t/library/*.t
+    t/library/*/*.t
     t/tools/*.t
     t/profiling/*.t
 );