cmake remove circular linking and reorganize

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

src/modules/landing_target_estimator/CMakeLists.txt

@@ -30,6 +30,7 @@
 # POSSIBILITY OF SUCH DAMAGE.
 #
 ############################################################################
+
 px4_add_module(
 	MODULE modules__landing_target_estimator
 	MAIN landing_target_estimator
@@ -40,6 +41,5 @@ px4_add_module(
 		LandingTargetEstimator.cpp
 		KalmanFilter.cpp
 	DEPENDS
-		platforms__common
 	)
-# vim: set noet ft=cmake fenc=utf-8 ff=unix :
+

src/modules/landing_target_estimator/LandingTargetEstimator.h

@@ -44,7 +44,7 @@
 
 #include <px4_workqueue.h>
 #include <drivers/drv_hrt.h>
-#include <systemlib/param/param.h>
+#include <parameters/param.h>
 #include <uORB/uORB.h>
 #include <uORB/topics/vehicle_local_position.h>
 #include <uORB/topics/vehicle_attitude.h>