[Clang] Use ULL for std::max constant argument to fix build failure.

getKnownMinValue returns uint64_t, use ULL to make sure the second arg
is also 64 bit.

clang/lib/CodeGen/Targets/Sparc.cpp

@@ -266,7 +266,7 @@ SparcV9ABIInfo::classifyType(QualType Ty, unsigned SizeLimit) const {
  // All structs, even empty ones, should take up a register argument slot,
  // so pin the minimum struct size to one bit.
  CB.pad(llvm::alignTo(
- std::max(CB.DL.getTypeSizeInBits(StrTy).getKnownMinValue(), 1UL), 64));
+ std::max(CB.DL.getTypeSizeInBits(StrTy).getKnownMinValue(), 1ULL), 64));
 
  // Try to use the original type for coercion.
  llvm::Type *CoerceTy = CB.isUsableType(StrTy) ? StrTy : CB.getType();