Add delay to the public box main function

This is to make sure that all boxes have started before launching the
public box threads.

Author: AlessandroA

source/main.cpp

@@ -90,6 +90,9 @@ int main(void)
     led_blue = LED_OFF;
     led_green = LED_OFF;
 
+    /* Add small delay to make sure all boxes have started. */
+    Thread::wait(100);
+
     /* Startup a few RPC runners. */
     /* Note: The stack must be at least 1kB since threads will use printf. */
     Thread sync(osPriorityNormal, 1024, NULL);