add 5 seconds sleep in socket_client.c when report Temperature

Guo Wenxue

2018-10-25 0bed6c0c87cef46d7e4b0d933cfcc8a10d39a81b

 apue/2.Socket/ds18b20.c

@@ -98,5 +98,7 @@
    /* convert string value to float value */
    *temp = atof(ptr)/1000;
   
    close(fd);

    return 0;
}