[libcxx-commits] [libcxx] [libc++] Move the locale support headers to __locale_dir/locale_base_api/ (PR #74522)

[Louis Dionne via libcxx-commits]

https://github.com/ldionne requested changes to this pull request.

This is a nice cleanup, and there's a lot more we can do too in future patches!

https://github.com/llvm/llvm-project/pull/74522