[llvm-branch-commits] [llvm] release/19.x: [cmake] Include GNUInstallDirs before using variables defined by it. (#83807) (PR #121410)

[via llvm-branch-commits]

llvmbot wrote:

@petrhosek What do you think about merging this PR to the release branch?

https://github.com/llvm/llvm-project/pull/121410