[llvm] [BOLT][AArch64] Fixes assertion errors occurred when perf2bolt was executed (PR #83394)

[Ádám Kallai via llvm-commits]

kaadam wrote:

> Hi! I don't really mind to add stubs like this, although I would prefer asm test, since it is too deeply relies on the compiler code generation. Let also @rafaelauler tell his opinion on this :)

Hi @yota9, I've updated the PR. I enclosed an asm test instead of C one. Could you take a look at it again, please? Thanks Adam.

https://github.com/llvm/llvm-project/pull/83394