[clang] [Matrix] Add a row\col major toggle in the clang driver (PR #167628)

[Florian Hahn via cfe-commits]

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@@ -3976,6 +3976,13 @@ void CompilerInvocationBase::GenerateLangArgs(const LangOptions &Opts,
     }
     GenerateArg(Consumer, OPT_falloc_token_mode_EQ, S);
   }
+  // Generate args for Matrices
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fhahn wrote:

```suggestion
  // Generate args for matrix types.
```

https://github.com/llvm/llvm-project/pull/167628