Introduce MCAsmInfo::UsesSetToEquateSymbol and prefer = to .set#142289

MaskRay merged 2 commits intomainllvm/llvm-project:mainfrom

users/MaskRay/spr/introduce-mcasminfousessettoequatesymbol-and-prefer-to-setllvm/llvm-project:users/MaskRay/spr/introduce-mcasminfousessettoequatesymbol-and-prefer-to-setCopy head branch name to clipboard