mission: add heading towards ROI mode for multicopters

src/modules/navigator/mission.h

@@ -61,6 +61,7 @@
 #include <uORB/topics/position_setpoint_triplet.h>
 #include <uORB/topics/vehicle_global_position.h>
 #include <uORB/topics/vehicle_status.h>
+#include <uORB/topics/vehicle_roi.h>
 #include <uORB/uORB.h>
 
 class Navigator;
@@ -86,7 +87,8 @@ public:
 		MISSION_YAWMODE_FRONT_TO_WAYPOINT = 1,
 		MISSION_YAWMODE_FRONT_TO_HOME = 2,
 		MISSION_YAWMODE_BACK_TO_HOME = 3,
-		MISSION_YAWMODE_MAX = 4
+		MISSION_YAWMODE_TO_ROI = 4,
+		MISSION_YAWMODE_MAX = 5
 	};
 
 	bool set_current_offboard_mission_index(unsigned index);