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

[Alois Klink via cfe-commits]

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@@ -177,6 +177,10 @@ def warn_unknown_attribute_ignored : Warning<
   "unknown attribute %0 ignored">, InGroup<UnknownAttributes>;
 def warn_attribute_ignored : Warning<"%0 attribute ignored">,
   InGroup<IgnoredAttributes>;
+def warn_multiarg_malloc_attribute_ignored: Warning<
+  "'malloc' attribute ignored because"
+  " Clang does not support the one/two argument form">,
+  InGroup<IgnoredAttributes>;
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aloisklink wrote:

Fixed in 02a153d9be1007b9603bcd14bf3f80d4bf900806, although I've very slightly changed the wording to match other warnings by using `because` instead of the `;`.

I've also added a couple of other error diagnostics in other commit, so please let me know if you think it's worth generalizing them too.

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