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

[Amir Ayupov via llvm-commits]

aaupov 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. 

Let's unblock testing first. It should be trivial to merge, no need to bundle up this fix. Thanks for addressing it though.

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