[libcxx-commits] [libcxx] [libc++] Add tests for the ABI break introduced by switching to _LIBCPP_COMPRESSED_PAIR (PR #154559)

[Louis Dionne via libcxx-commits]

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

LGTM with green CI and my small comment applied, thanks!

https://github.com/llvm/llvm-project/pull/154559