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

[Aaron Ballman via cfe-commits]

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@@ -296,6 +296,11 @@ StmtResult Parser::ParseStatementOrDeclarationAfterAttributes(
     goto Retry;
   }
 
+  case tok::kw_alignas: {
+    ParseAlignmentSpecifier(CXX11Attrs);
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AaronBallman wrote:

I think this means we now quietly accept this code: https://godbolt.org/z/eb9MhvTWd

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