[compiler-rt] [sanitizer_common] Implement address sanitizer on AIX: process memory mapping (7/n) (PR #138537)

[Vitaly Buka via llvm-commits]

https://github.com/vitalybuka approved this pull request.

LGTM, but I didn't look into AIX specifics

Please (7/n) -> issue #

https://github.com/llvm/llvm-project/pull/138537