Differential Rover: Update airframe architecture

ROMFS/px4fmu_common/init.d/rc.rover_differential_apps

@@ -0,0 +1,24 @@
+#!/bin/sh
+#
+# Standard apps for unmanned ground vehicles (UGV).
+#
+# NOTE: Script variables are declared/initialized/unset in the rcS script.
+#
+
+#
+# Start the attitude and position estimator.
+#
+ekf2 start &
+#attitude_estimator_q start
+#local_position_estimator start
+
+#
+# Start manual rover differential drive controller.
+#
+# differential_drive_control start
+
+
+#
+# Start Land Detector.
+#
+land_detector start rover