[clang] [Clang][attr] Add 'cfi_salt' attribute (PR #141846)

[Bill Wendling via cfe-commits]

bwendling wrote:

> Removing my approval-- I thought the changes requested were nits, but amount of discussion shows that was not true.

Wrong. They aren't nits. It's just you lacking a fundamental understanding of the code. Sorry for the confusion, but I wrote the code to avoid ICEs. I don't simply go around adding dead paths to code.

https://github.com/llvm/llvm-project/pull/141846