Fix jmavsim (#4)

* Install jMAVSim dependencies

* Restore jMAVSim desktop shortcut

* Try running jmavsim on validation

assets/desktop/Clover Drone Kit Tools.desktop

@@ -0,0 +1,7 @@
+[Desktop Entry]
+Version=1.0
+Type=Link
+Name=Clover Drone Kit Tools
+Comment=Open web based Clover tools
+Icon=user-bookmarks
+URL=http://localhost/

scripts/install_software.sh

@@ -35,6 +35,7 @@ git clone --recursive --depth 1 --branch v1.12.0 https://github.com/PX4/PX4-Auto
 # PX4 v1.11.1 script will happily run sudo by itself
 ${HOME}/PX4-Autopilot/Tools/setup/ubuntu.sh
 # Ubuntu 20.04 no longer sets assistive_technologies, thankfully
+sudo -E sh -c 'apt-get install -y ant openjdk-11-jdk' # Additional packages for jMAVSim
 
 echo "--- Prebuilding PX4 SITL configuration"
 make -C ${HOME}/PX4-Autopilot px4_sitl
@@ -109,7 +110,7 @@ echo "source ${HOME}/catkin_ws/devel/setup.bash" >> ~/.bashrc
 source $HOME/catkin_ws/devel/setup.bash
 
 echo "--- Adding Clover vehicle startup script to PX4"
-ln -s "$(catkin_find clover_simulation airframes)/*" $HOME/PX4-Autopilot/ROMFS/px4fmu_common/init.d-posix/airframes/
+ln -s "$(catkin_find clover_simulation airframes)"/* $HOME/PX4-Autopilot/ROMFS/px4fmu_common/init.d-posix/airframes/
 
 echo "--- Installing npm"
 cd ${HOME}
@@ -202,3 +203,7 @@ rosversion nodelet
 
 echo "Trying running the Gazebo simulator, check the output"
 timeout --preserve-status 30 roslaunch clover_simulation simulator.launch gui:=false --screen
+
+echo "Trying running jMAVSim, check the output"
+cd ~/PX4-Autopilot
+HEADLESS=1 timeout --preserve-status 30 make px4_sitl jmavsim