[compiler-rt] [llvm] [AArch64] Implement INIT/ADJUST_TRAMPOLINE (PR #70267)

[Carlos Seo via llvm-commits]

ceseo wrote:

> > Updates #27174
> 
> Can you change the description? It will be used as the default commit message when you click "Squash and merge". git commit messages are completely ignored.

OK. I'll fix the test and the description and resubmit.

https://github.com/llvm/llvm-project/pull/70267