cmake remove circular linking and reorganize

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

src/modules/navigator/CMakeLists.txt

@@ -54,6 +54,6 @@ px4_add_module(
 		gpsfailure.cpp
 		follow_target.cpp
 	DEPENDS
-		platforms__common
+		git_ecl
+		ecl
 	)
-# vim: set noet ft=cmake fenc=utf-8 ff=unix :

src/modules/navigator/navigator.h

@@ -58,7 +58,7 @@
 #include <navigator/navigation.h>
 #include <px4_module_params.h>
 #include <px4_module.h>
-#include <systemlib/perf_counter.h>
+#include <perf/perf_counter.h>
 #include <uORB/topics/fw_pos_ctrl_status.h>
 #include <uORB/topics/geofence_result.h>
 #include <uORB/topics/mission.h>