[llvm] [BOLT]Identify indirect call (PR #123305)

[Paschalis Mpeis via llvm-commits]

https://github.com/paschalis-mpeis commented:

Hey @liusy58 ,

Thanks for working on this! I've left few comments below.
Also, can you revise your description [here](https://github.com/llvm/llvm-project/pull/123305#issue-2794943176) ?

https://github.com/llvm/llvm-project/pull/123305