[fixedwing] convert nav_survey_rectangle to a module

conf/airframes/examples/microjet.xml

@@ -194,6 +194,7 @@
 
   <modules>
     <load name="openlog.xml"/>
+    <load name="nav_survey_rectangle.xml"/>
     <load name="infrared_adc.xml"/>
     <load name="digital_cam_servo.xml">
       <define name="DC_SHUTTER_SERVO" value="COMMAND_SHUTTER" />

conf/firmwares/subsystems/fixedwing/navigation.makefile

@@ -9,6 +9,6 @@ $(TARGET).CFLAGS += -DNAV
 $(TARGET).srcs += $(SRC_SUBSYSTEMS)/nav.c
 $(TARGET).srcs += $(SRC_SUBSYSTEMS)/navigation/common_flight_plan.c
 $(TARGET).srcs += $(SRC_SUBSYSTEMS)/navigation/traffic_info.c
-$(TARGET).srcs += $(SRC_SUBSYSTEMS)/navigation/nav_survey_rectangle.c $(SRC_SUBSYSTEMS)/navigation/nav_line.c
+$(TARGET).srcs += $(SRC_SUBSYSTEMS)/navigation/nav_line.c
 
 

conf/firmwares/subsystems/fixedwing/navigation_extra.makefile

@@ -9,7 +9,7 @@ $(TARGET).CFLAGS += -DNAV
 $(TARGET).srcs += $(SRC_SUBSYSTEMS)/nav.c
 $(TARGET).srcs += $(SRC_SUBSYSTEMS)/navigation/common_flight_plan.c
 $(TARGET).srcs += $(SRC_SUBSYSTEMS)/navigation/traffic_info.c
-$(TARGET).srcs += $(SRC_SUBSYSTEMS)/navigation/nav_survey_rectangle.c $(SRC_SUBSYSTEMS)/navigation/nav_line.c
+$(TARGET).srcs += $(SRC_SUBSYSTEMS)/navigation/nav_line.c
 
 $(TARGET).srcs += $(SRC_SUBSYSTEMS)/navigation/OSAMNav.c
 $(TARGET).srcs += $(SRC_SUBSYSTEMS)/navigation/snav.c

conf/modules/nav_survey_rectangle.xml

@@ -0,0 +1,16 @@
+<!DOCTYPE module SYSTEM "module.dtd">
+
+<module name="nav_survey_rectangle" dir="nav">
+  <doc>
+    <description>
+      Automatic survey of a rectangle for fixedwings.
+      Rectangle is defined in flight plan by two points, sweep can be south-north or west-east.
+    </description>
+  </doc>
+  <header>
+    <file name="nav_survey_rectangle.h"/>
+  </header>
+  <makefile>
+    <file name="nav_survey_rectangle.c"/>
+  </makefile>
+</module>