[llvm] [bolt][aarch64] Add load-acquire & store-release instructions (PR #146035)

[Paschalis Mpeis via llvm-commits]

https://github.com/paschalis-mpeis commented:

Looks good! Thanks for the addition Alexei.
Do you have a small lit test to accompany the patch?

For additions like this, unittests might be easy to add; not sure what others think?

https://github.com/llvm/llvm-project/pull/146035