[clang] Enable matrices in HLSL (PR #111415)

[Farzon Lotfi via cfe-commits]

================
@@ -1381,7 +1381,7 @@ void ASTContext::InitBuiltinTypes(const TargetInfo &Target,
   if (LangOpts.OpenACC && !LangOpts.OpenMP) {
     InitBuiltinType(ArraySectionTy, BuiltinType::ArraySection);
   }
-  if (LangOpts.MatrixTypes)
+  if (LangOpts.MatrixTypes || LangOpts.HLSL)
----------------
farzonl wrote:

If this is the only line this will be needed then feel free to ignore this comment. 

My question is  could there be places where `LangOpts.MatrixTypes` could diverge from HLSL? 

If so instead is it possible for `LangOpts.HLSL` to turn on `LangOpts.MatrixTypes`?

https://github.com/llvm/llvm-project/pull/111415