[clang] [clang] Ignore GCC 11 `[[malloc(x)]]` attribute (PR #68059)

[Shafik Yaghmour via cfe-commits]

================
@@ -1629,6 +1629,8 @@ def IFunc : Attr, TargetSpecificAttr<TargetELF> {
 
 def Restrict : InheritableAttr {
   let Spellings = [Declspec<"restrict">, GCC<"malloc">];
+  let Args = [IdentifierArgument<"Deallocator", /*opt*/ 1>,
+              ParamIdxArgument<"DeallocatorPtrArgIndex", /*opt*/ 1>];
----------------
shafik wrote:

```suggestion
  let Args = [IdentifierArgument<"Deallocator", /*opt=*/1>,
              ParamIdxArgument<"DeallocatorPtrArgIndex", /*opt=*/ 1>];
```

https://github.com/llvm/llvm-project/pull/68059