message: fix build with latest version of llvm
diff: @@ -447,12 +447,12 @@ known_call(llvm::CallInst &i, const llvm::TargetLibraryInfo &TLI,
  RETURN_VAL(
  make_unique<Malloc>(*ty, value_name(i), *args[0], isNonNull, align(i)));
  }
  - if (llvm::isReallocLikeFn(&i, &TLI)) {
  + if (llvm::getReallocatedOperand(&i, &TLI)) {
  bool isNonNull = i.hasRetAttr(llvm::Attribute::NonNull);
  RETURN_VAL(make_unique<Malloc>(*ty, value_name(i), *args[0], *args[1],
  isNonNull, align(i)));
  }
  - if (llvm::isFreeCall(&i, &TLI)) {
  + if (llvm::getFreedOperand(&i, &TLI)) {
  if (i.hasFnAttr(llvm::Attribute::NoFree)) {
  auto zero = make_intconst(0, 1);
  RETURN_VAL(make_unique<Assume>(*zero, Assume::AndNonPoison));
  