[llvm-branch-commits] [libcxx] release/18.x: Reapply [libcxx] [modules] Fix relative paths with absolute LIBCXX_INSTALL_MODULES_DIR (#86020) (PR #86197)

[Tom Stellard via llvm-branch-commits]

tstellar wrote:

Hi @mstorsjo (or anyone else). If you would like to add a note about this fix in the release notes (completely optional). Please reply to this comment with a one or two sentence description of the fix.

https://github.com/llvm/llvm-project/pull/86197