[llvm] [DXIL] Adding support to RootSignatureFlags in obj2yaml (PR #122396)

[Finn Plummer via llvm-commits]

================
@@ -192,6 +202,11 @@ Error DXContainer::parsePartOffsets() {
         return Err;
       break;
     case dxbc::PartType::Unknown:
+      break;
+    case dxbc::PartType::RTS0:
+      if (Error Err = parseRootSignature(PartData))
+        return Err;
+
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inbelic wrote:

```suggestion
```

https://github.com/llvm/llvm-project/pull/122396