[llvm] [BOLT][AArch64] Fix ifuncs test header inclusion (PR #71741)

[Vladislav Khmelevsky via llvm-commits]

yota9 wrote:

Thanks @rafaelauler . Initially I've started to write runtime test and forgot to remove the lines. But saw it during preparing #71635 and fixed it, would be thankful for your approve so I won't have to rebase it. If there are some comments there fill free to submit your fix first. 

https://github.com/llvm/llvm-project/pull/71741