fix ut

tests/ut/ge/single_op/single_op_model_unittest.cc

@@ -425,9 +425,9 @@ TEST_F(UtestSingleOpModel, build_memcpoy_task) {
   domi::KernelDef kernel_def;
   kernel_def.set_args(reinterpret_cast<const char *>(&args), args.head.length);
   kernel_def.set_args_size(args.head.length);
+  AiCpuCCTask aicpu_task;
   ASSERT_EQ(aicpu_task.SetMemCopyTask(kernel_def), FAILED);
   kernel_def.set_args_size(0);
-  AiCpuCCTask aicpu_task;
   ASSERT_EQ(aicpu_task.SetMemCopyTask(kernel_def), FAILED);
   char* args2 = "123";
   kernel_def.set_args(reinterpret_cast<const char *>(&args2), 3);