Add official support for remote desktop/x11vnc

[wuxiaohua1011]

Current setup of the Jetson requires physical connection of keyboard and monitor, it would be great if we can utilize tools such as ssh for simple cmd operations and x11vnc for virtual desktop. Furthermore, it would definitely help a lot when we go for field testing, and when we need live debug session.

I have already done this setup and proven that it can be done. Unfortunately I did not note down the exact commands, but the procedure would look like this:

1. Set up ssh EX: Set up ssh on Rapsberry Pi (will be the same for Jetson)
2. start the x11vnc service
3. on your client computer(which is whichever one that you use daily), download an x11vnc viewer
   I used this one: VNC Viewer
4. input necessary information (host, ip addr, etc). You can get ip address by typing ifconfig in Jetson Terminal, and choose the one that looks something like 192.168.42.23.
5. you are done, enjoy remote programming