[clang] [AIX][TOC] -mtocdata/-mno-tocdata fix non deterministic iteration order (PR #86840)

[Sean Fertile via cfe-commits]

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

LGTM. Zaara pointed out offline that we can't rely on the input being sorted despite this change because you can invoke the front end directly with an argument list in unsorted order.

https://github.com/llvm/llvm-project/pull/86840