[clang] [Clang][CodeGen] Emit fake uses before musttail calls (PR #136867)

[via cfe-commits]

gulfemsavrun wrote:

Is there anything that is blocking this PR to be merged? If it needs more time to review, could you please revert the original change and reland with this fix? This is blocking us to roll Clang in our project.

https://github.com/llvm/llvm-project/pull/136867