D122746 missed the following tests, so this patch adds them. This patch refactors D122949, which marked the following tests XFAIL, but it makes more sense to temporarily add `--format=gnu` option because these tests aren’t testing `llvm-ar` and AIX won’t lose their coverage. Reviewed By: jhenderson, MaskRay, DiggerLin Differential Revision: https://reviews.llvm.org/D123063