[libcxx-commits] [libcxx] [libcxx] Provide locale conversions to tests through lit substitution (PR #105651)

[Louis Dionne via libcxx-commits]

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

Sorry for the long delay on this review, it kind of slipped between the cracks. I think this looks fine, and it's definitely an improvement over the status quo.

https://github.com/llvm/llvm-project/pull/105651