[PATCH] D99484: Use `GNUInstallDirs` to support custom installation dirs.

[Louis Dionne via Phabricator via cfe-commits]

ldionne accepted this revision as: libc++, libc++abi.
ldionne added a comment.

LGTM for libcxx and libcxxabi.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D99484/new/

https://reviews.llvm.org/D99484