autotest: add easier HIL start scripts for rover/plane

Tools/autotest/sim_arduplane_hil.sh

+#!/bin/bash
+
+killall -q JSBSim
+pkill -f runsim.py
+
+set -e
+set -x
+
+gnome-terminal -e '../Tools/autotest/jsbsim/runsim.py --home=-35.362938,149.165085,584,270'
+sleep 2
+
+mavproxy.py --out 127.0.0.1:14550 --load-module=HIL $*

Tools/autotest/sim_rover_hil.sh

+#!/bin/bash
+
+set -x
+
+pkill -f sim_rover.py
+set -e
+
+gnome-terminal -e "nice ../Tools/autotest/pysim/sim_rover.py --home=40.071374969556928,-105.22978898137808,1583.702759,246 --rate=400"
+sleep 2
+mavproxy.py --aircraft=test --out 127.0.0.1:14550 --load-module=HIL $*