Bugfix: support unknown control op subgraph

tests/ut/ge/hybrid/ge_hybrid_unittest.cc

@@ -273,7 +273,7 @@ TEST_F(UtestGeHybrid, unfold_subgraphs_success) {
   NodePtr sub_sub_graph_while_cond_data_node = sub_sub_graph1->AddNode(sub_sub_graph_while_cond_data_op_desc);
 
   ComputeGraphPtr sub_sub_graph2 = std::make_shared<ComputeGraph>("while body");
-  OpDescPtr sub_sub_graph_while_body_const_op_desc = CreateOpDesc("body_const", CONST);
+  OpDescPtr sub_sub_graph_while_body_const_op_desc = CreateOpDesc("body_const", CONSTANT);
   NodePtr sub_sub_graph_while_body_const_node = sub_sub_graph2->AddNode(sub_sub_graph_while_body_const_op_desc);
   OpDescPtr sub_sub_graph_while_body_data_op_desc = CreateOpDesc("body_data", DATA);
   NodePtr sub_sub_graph_while_body_data_node = sub_sub_graph2->AddNode(sub_sub_graph_while_body_data_op_desc);