message: Update feedback code to not use ptr-to-function type
  * The previous PR that added this code existed before ptr-to-function was
  stripped down to just function for function types, so this change brings it in
  line.
diff: @@ -260,13 +260,10 @@ static bool AnnotateDXILShader(const DXBC::DXBCContainer *dxbc, uint32_t space,
  funcTypeTmp.members = {i32, resBindType, i32, i1};
  funcType = editor.AddType(funcTypeTmp);
  }
  - DXIL::Type funcPtrType;
  - funcPtrType.type = DXIL::Type::Pointer;
  - funcPtrType.inner = funcType;
  DXIL::Function createHandleBaseFunction;
  createHandleBaseFunction.name = "dx.op.createHandleFromBinding";
  - createHandleBaseFunction.funcType = editor.AddType(funcPtrType);
  + createHandleBaseFunction.funcType = funcType;
  createHandleBaseFunction.external = true;
  for(const DXIL::AttributeSet &attrs : editor.GetAttributeSets())
  