[compiler-rt] [RISCV][compiler-rt] Small fixes for __riscv_feature_bits (PR #99958)

[Philip Reames via llvm-commits]

preames wrote:

> After rebuilding the test environment, it now works as expected. I believe the issue was due to mixing with an old version of the compiler-rt archive file. I apologize for the disturbance. I'm going to merge it on #100158.

No problem, that's pretty much best outcome here.  Thanks!

https://github.com/llvm/llvm-project/pull/99958