[llvm] [Bolt] Teach bolt about no-return functions (PR #115616)

[Gergely Bálint via llvm-commits]

bgergely0 wrote:

@elhewaty I am not referring to the unittests or similar. I mean you should check the example code in from the issue, compile it, and run BOLT on it, and after the Pass is done, check which functions it marked as noreturn. 

You can run an instrumentation, and BOLT will run this Pass during it. 

https://github.com/llvm/llvm-project/pull/115616