cmake remove circular linking and reorganize

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

src/modules/fw_att_control/CMakeLists.txt

@@ -36,7 +36,6 @@ px4_add_module(
 	SRCS
 		FixedwingAttitudeControl.cpp
 	DEPENDS
-		platforms__common
 		git_ecl
 		ecl
 	)

src/modules/fw_att_control/FixedwingAttitudeControl.hpp

@@ -43,8 +43,8 @@
 #include <px4_defines.h>
 #include <px4_posix.h>
 #include <px4_tasks.h>
-#include <systemlib/param/param.h>
-#include <systemlib/perf_counter.h>
+#include <parameters/param.h>
+#include <perf/perf_counter.h>
 #include <uORB/Subscription.hpp>
 #include <uORB/topics/actuator_controls.h>
 #include <uORB/topics/airspeed.h>