[clang] [compiler-rt] [Sanitizer] add signed-integer-wrap sanitizer (PR #80089)

[Vitaly Buka via cfe-commits]

vitalybuka wrote:

Why not just enforce -fsanitize=signed-integer-overflow with -fwrapv? I suspect it's just overlook, and not intentional behavior. 

https://github.com/llvm/llvm-project/pull/80089