[llvm-branch-commits] [libcxx] [libc++][modules] Improves std.compat module. (PR #76330)

[Louis Dionne via llvm-branch-commits]

https://github.com/ldionne approved this pull request.

I guess I don't actually need to see this again if the CI passes once this is rebased on top of the parent changes.

https://github.com/llvm/llvm-project/pull/76330