cmake remove circular linking and reorganize

- px4_add_module now requires MAIN
 - px4_add_library doesn't automatically link

src/modules/land_detector/CMakeLists.txt

@@ -43,6 +43,5 @@ px4_add_module(
 		VtolLandDetector.cpp
 		RoverLandDetector.cpp
 	DEPENDS
-		platforms__common
 	)
-# vim: set noet ft=cmake fenc=utf-8 ff=unix :
+

src/modules/land_detector/LandDetector.h

@@ -45,8 +45,8 @@
 #include <px4_workqueue.h>
 #include <px4_module.h>
 #include <systemlib/hysteresis/hysteresis.h>
-#include <systemlib/param/param.h>
-#include <systemlib/perf_counter.h>
+#include <parameters/param.h>
+#include <perf/perf_counter.h>
 #include <uORB/uORB.h>
 #include <uORB/topics/actuator_armed.h>
 #include <uORB/topics/vehicle_land_detected.h>

src/modules/land_detector/MulticopterLandDetector.h

@@ -44,8 +44,7 @@
 
 #include "LandDetector.h"
 
-#include <drivers/drv_hrt.h>
-#include <systemlib/param/param.h>
+#include <parameters/param.h>
 #include <uORB/topics/vehicle_local_position.h>
 #include <uORB/topics/vehicle_local_position_setpoint.h>
 #include <uORB/topics/vehicle_attitude.h>