[compiler-rt] [compiler-rt] Initial support for builtins on GPU targets (PR #95304)

[Yaxun Liu via llvm-commits]

yxsamliu wrote:

LGTM on HIP side. We could use it like we use device libraries since it is GPU-arch-neutral. I think it is good it have the bitcode lib built first and then consider adding object libs in a progressive way.

https://github.com/llvm/llvm-project/pull/95304