[llvm] [BOLT][RISCV] Fix conditional tail call (PR #209474)

[Pengcheng Wang via llvm-commits]

wangpc-pp wrote:

I added some RISC-V reviewers. And I don't know if colleagues from Igalia are still working on BOLT? cc @lukel97 @asb 

https://github.com/llvm/llvm-project/pull/209474