[libunwind][AIX] implementation of the unwinder for AIX

Summary:
This is an add-on patch to address comments.
- Replace #elif in file <assembly.h> with #else as suggested;
- Reversed the indentation changes in the main patch.

Differential Revision: https://reviews.llvm.org/D100132

NOKEYCHECK=True
GitOrigin-RevId: 9c0152cda35f58ad9916b698c7a645d4a4dfeaf2
2 files changed
tree: 72ab9eafe10ed7e586090e95dc62550252e36a9b
  1. cmake/
  2. docs/
  3. include/
  4. src/
  5. test/
  6. .clang-format
  7. CMakeLists.txt
  8. LICENSE.TXT