[llvm-branch-commits] [hwasan] Check order of mapping flags (PR #109621)

[Vitaly Buka via llvm-branch-commits]

https://github.com/vitalybuka created https://github.com/llvm/llvm-project/pull/109621

Flags "-hwasan-mapping-offset" and
"-hwasan-mapping-offset-dynamic" are mutually
exclusive, use the last one.