service: Ensure starting when there's a ttyGS0 to write to Also fix lintian sillyness. Change-Id: Ia9aa5228b20f080f1fd1a720e91111134ba1964b
vitalsd is a very simple tool that samples vital system statistics (CPU load, free/total memory, temperatures, etc.) and outputs them periodically to a serial port. It's designed to be used on embedded systems with physical serial ports that can crash in unexpected ways that leave the system in a non-triageable state.