[Frontend] Use StringRef::ends_with (NFC)#135988

kazutakahirata merged 1 commit intollvm:mainllvm/llvm-project:mainfrom

kazutakahirata:cleanup_001_StringRef_ends_with_clang_FrontEndkazutakahirata/llvm-project:cleanup_001_StringRef_ends_with_clang_FrontEndCopy head branch name to clipboard