[clang] [llvm] Reapply "runtimes: Pass CMAKE_SYSTEM_NAME based on target triple" (#205133) (PR #208496)

[Matt Arsenault via cfe-commits]

arsenm wrote:

Another idea, which would at least avoid maintaining all the triple names is to extract the TargetParser code into a separate file that's more reasonable for a cmake or python script to read: https://github.com/llvm/llvm-project/pull/208722

https://github.com/llvm/llvm-project/pull/208496