[llvm] [DXIL] Add support for root signature flag element in DXContainer (PR #123147)

[Chris B via llvm-commits]

================
@@ -0,0 +1,196 @@
+//===- DXILRootSignature.cpp - DXIL Root Signature helper objects ----===//
----------------
llvm-beanz wrote:

I think I counted this right
```suggestion
//===- DXILRootSignature.cpp - DXIL Root Signature helper objects -------===//
```

https://github.com/llvm/llvm-project/pull/123147