message: Fix mlir error_util_test on windows.
diff: @@ -58,7 +58,8 @@ TEST(ErrorUtilTest, StatusScopedDiagnosticHandler) {
  emitError(loc) << "Second diagnostic message reported";
  return tensorflow::errors::Internal("Passed in error");
  };
  - Status s = StatusScopedDiagnosticHandler(&context).Combine(function());
  + StatusScopedDiagnosticHandler ssdh(&context);
  + Status s = ssdh.Combine(function());
  ASSERT_TRUE(tensorflow::errors::IsInternal(s));
  EXPECT_THAT(s.error_message(), HasSubstr("Passed in error"));
  EXPECT_THAT(s.error_message(), HasSubstr("Diagnostic message reported"));
  