[clang] [llvm] [CMake] Version Darwin dylib identities (PR #189004)

[Steven Wu via cfe-commits]

cachemeifyoucan wrote:

libclang change doesn't seem to be done correctly. See: https://green.lab.llvm.org/job/llvm.org/job/clang-stage2-Rthinlto/job/main/116/

https://github.com/llvm/llvm-project/pull/189004