[PATCH] D117419: [clang][cmake] Use `GNUInstallDirs` to support custom installation dirs

[John Ericson via Phabricator via cfe-commits]

Ericson2314 added a comment.

I will land this next as part of my great D99484 <https://reviews.llvm.org/D99484> bisect. Now that I have in fact found the issue, I am more confident this part, which is analogous to all the parts that have gone in fine, is harmless.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D117419/new/

https://reviews.llvm.org/D117419