fix ut

tests/ut/ge/single_op/single_op_model_unittest.cc

@@ -416,6 +416,8 @@ TEST_F(UtestSingleOpModel, build_dynamic_task02) {
   model.node_tasks_[node] = { *task_def, *task_def };
   op_desc->SetOpKernelLibName(kEngineNameAiCpu);
   model.BuildTaskListForDynamicOp(res, single_op);
+  model.node_tasks_[node] = { *task_def};
+  model.BuildTaskListForDynamicOp(res, single_op);
 }
 
 TEST_F(UtestSingleOpModel, build_memcpoy_task) {