Fix the return stat check.

Fu Juntang

2021-08-30 ab578ff5dbdc19b9647e3535e7d41306e46fab5d

 test_net_socket/net_mod_socket.sh

@@ -11,7 +11,7 @@
   ./shm_util recvfrom --bind=102 & server_pid=$! &&  echo "pid: ${server_pid}" 

   # 打开回队列收进程
   ./shm_util start_resycle & server_pid=$! &&  echo "pid: ${server_pid}" 
   # ./shm_util start_resycle & server_pid=$! &&  echo "pid: ${server_pid}" 
}

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