examples/usrsocktest: add some delay to wait the daemon task ready

Signed-off-by: chao an <anchao@xiaomi.com>

examples/usrsocktest/usrsocktest_daemon.c

@@ -2053,6 +2053,12 @@ errout_closepipe:
 out:
   pthread_mutex_unlock(&daemon_mutex);
   usrsocktest_dbg("ret: %d\n", ret);
+
+  if (ret == OK)
+    {
+      usleep(100);
+    }
+
   return ret;
 }
 
@@ -2329,6 +2335,11 @@ bool usrsocktest_send_delayed_command(const char cmd,
 
   sq_addlast(&delayed_cmd->node, &priv->delayed_cmd_threads);
 
+  if (ret == OK)
+    {
+      usleep(100);
+    }
+
   return true;
 }