[compiler-rt] [llvm] [RISC-V] Add newer Linux hwprobe extensions detection (PR #192761)

[Jiaqi He via llvm-commits]

heturing wrote:

Sounds good. I've rebased my PR based on https://github.com/llvm/llvm-project/pull/199438.

https://github.com/llvm/llvm-project/pull/192761