message: Minor fix for Rank, which will not get placed on ngraph without this
diff: @@ -287,6 +287,7 @@ Status MarkForClustering(Graph* graph) {
  confirmation_function_map["PreventGradient"] =
  SimpleConfirmationFunction();
  confirmation_function_map["Prod"] = SimpleConfirmationFunction();
  + confirmation_function_map["Rank"] = SimpleConfirmationFunction();
  confirmation_function_map["QuantizeAndDequantizeV2"] = [](Node* n,
  bool* result) {
  // accept only when num_bits == 8 and range is given
  