[clang] [CLANG] Enable alignas after GNU attributes (PR #133107)

[Aaron Ballman via cfe-commits]

================
@@ -3062,13 +3062,16 @@ class Parser : public CodeCompletionHandler {
                             bool CouldBeBitField = false);
   Decl *ParseHLSLBuffer(SourceLocation &DeclEnd);
 
-  void MaybeParseMicrosoftAttributes(ParsedAttributes &Attrs) {
+  bool MaybeParseMicrosoftAttributes(ParsedAttributes &Attrs) {
+    bool AttrsParsed = false;
     if ((getLangOpts().MicrosoftExt || getLangOpts().HLSL) &&
         Tok.is(tok::l_square)) {
       ParsedAttributes AttrsWithRange(AttrFactory);
       ParseMicrosoftAttributes(AttrsWithRange);
+      AttrsParsed = AttrsWithRange.size();
----------------
AaronBallman wrote:

```suggestion
      AttrsParsed = !AttrsWithRange.empty();
```

https://github.com/llvm/llvm-project/pull/133107