commsec server: supports verbose logging

helpful for debugging: ./gcs.sh -v
will give a very chatty output, you probably want to
./gcs.sh 2>&1 | grep TOVEH
or FROMVEH to see relevant information
bump mavlink
flight gcs transmit: identify as autopilot type as smaccmpilot
flight: deprecate Types.Position for GPS.Types.Position; HIL works

* Only tried HIL for a quick short hop. Not fully tested yet.