[libc] [llvm] [libc] Use llvm-link approach to create libc bitcode library for GPU targets (PR #210662)

[via llvm-commits]

jinge90 wrote:

Hi, @jhuber6 
Could you help review again? The latest PR has 1 update since your last approval: adding a dependency on llvm-link for LLVM runtime building targets for GPU.

Thanks very much.

https://github.com/llvm/llvm-project/pull/210662