[bebop] ignore some unused result warnings and add to conf_tests

conf/conf_tests.xml

@@ -351,6 +351,17 @@
    settings_modules=""
    gui_color="blue"
   />
+  <aircraft
+   name="bebop"
+   ac_id="202"
+   airframe="airframes/bebop.xml"
+   radio="radios/cockpitSX.xml"
+   telemetry="telemetry/default_rotorcraft.xml"
+   flight_plan="flight_plans/rotorcraft_basic.xml"
+   settings="settings/rotorcraft_basic.xml settings/control/rotorcraft_guidance.xml settings/control/stabilization_rate.xml settings/control/stabilization_att_int.xml"
+   settings_modules=""
+   gui_color="red"
+  />
   <aircraft
    name="krooz_quad"
    ac_id="23"

sw/airborne/boards/bebop/video.c

@@ -64,6 +64,9 @@ static bool_t _write(int fd, char *data, uint8_t cnt)
   return TRUE;
 }
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-result"
+
 /**
  * Initialisation of the Aptina MT9V117 CMOS sensor
  */
@@ -430,3 +433,5 @@ void mt9f002_init(void)
   write(fd_i2c, "\1\0\1", 3);
   close(fd_i2c);
 }
+
+#pragma GCC diagnostic pop /* end disable -Wunused-result */