[compiler-rt] [sanitizer_common] Implement address sanitizer on AIX: add platform specific functionality (4/6) (PR #131868)

[Jake Egan via llvm-commits]

jakeegan wrote:

Split part of the PR to:
https://github.com/llvm/llvm-project/pull/138556
https://github.com/llvm/llvm-project/pull/138537
https://github.com/llvm/llvm-project/pull/138188

I'll also open an issue to attach all the PRs to.

https://github.com/llvm/llvm-project/pull/131868