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

[Carlos Seo via llvm-commits]

ceseo wrote:

Not for now. I'm waiting until the support for procedure pointers is fully implemented and then I'll give it another shot to avoid executable stack.

If you think this is useful as is until then, please feel free to merge it.

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