[libcxx-commits] [libcxx] Reapply [libcxx] [modules] Fix relative paths with absolute LIBCXX_INSTALL_MODULES_DIR (PR #86020)

[Paul Kirth via libcxx-commits]

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

LGTM. This seems like a sound approach to me but you may want to double check with Petr. 

https://github.com/llvm/llvm-project/pull/86020