[llvm] [BOLT] Add validation for direct call/branch targets, bypassing invalid functions (PR #165406)

[Paschalis Mpeis via llvm-commits]

https://github.com/paschalis-mpeis approved this pull request.

Hi @Jinjie-Huang,

Sorry for the late reply and thanks for the patch.
Please wait for @maksfb in case he has follow-ups.

Only if it's quite easy, it would be nice to have an AArch64 test as well. :)

https://github.com/llvm/llvm-project/pull/165406