[Bug testsuite/64673] libgomp missing unsupported tests at -m32/-m64

[howarth at bromo dot med.uc.edu]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64673

--- Comment #1 from howarth at bromo dot med.uc.edu ---
Seen on x86_64-unknown-linux-gnu and on x86_64 darwin (with
https://gcc.gnu.org/bugzilla/attachment.cgi?id=34480).