[llvm] [DirectX] Add DXIL_MODULE_FLAG for ShaderFlags. (PR #83217)

[Chris B via llvm-commits]

================
@@ -29,23 +28,35 @@ class GlobalVariable;
 namespace dxil {
 
 struct ComputedShaderFlags {
-#define SHADER_FEATURE_FLAG(bit, FlagName, Str) bool FlagName : 1;
+#define SHADER_FEATURE_FLAG(bit, DxilModuleBit, FlagName, Str)                 \
----------------
llvm-beanz wrote:

```suggestion
#define SHADER_FEATURE_FLAG(Bit, DxilModuleBit, FlagName, Str)                 \
```

https://github.com/llvm/llvm-project/pull/83217