[llvm] [BOLT] Err when linking objects of different architectures (PR #66770)

[Vladislav Khmelevsky via llvm-commits]

yota9 wrote:

AFAICT the symbol is came from libc and it does nothing but return. But since BOLT tests doesn't use libc the _fini symbol is absent and that is why we have to create it manually in our tests

https://github.com/llvm/llvm-project/pull/66770