Add dedicated survey camera plane model

This is to allow us to test triggering properly in SITL

ROMFS/px4fmu_common/init.d-posix/1031_plane_cam

@@ -4,3 +4,11 @@
 #
 
 sh /etc/init.d-posix/1030_plane
+
+if [ $AUTOCNF = yes ]
+then
+	# Camera trigger interface is MAVLink
+	param set TRIG_INTERFACE 3
+	# Distance trigger mode enabled
+	param set TRIG_MODE 4
+fi

platforms/posix/cmake/sitl_target.cmake

@@ -61,8 +61,8 @@ ExternalProject_Add(mavsdk_tests
 set(viewers none jmavsim gazebo)
 set(debuggers none ide gdb lldb ddd valgrind callgrind)
 set(models none shell
-	if750a iris iris_opt_flow iris_opt_flow_mockup iris_vision iris_rplidar iris_irlock iris_obs_avoid iris_rtps solo typhoon_h480
-	plane plane_catapult
+	if750a iris iris_opt_flow iris_vision iris_rplidar iris_irlock iris_obs_avoid iris_rtps solo typhoon_h480
+	plane plane_cam plane_catapult
 	standard_vtol tailsitter tiltrotor
 	rover boat
 	uuv_hippocampus)