AP_Baro: fixed example build

libraries/AP_Baro/examples/BARO_generic/BARO_generic.pde

@@ -9,6 +9,20 @@
 #include <AP_Buffer.h>
 #include <Filter.h>
 #include <AP_Baro.h>
+#include <AP_Notify.h>
+#include <AP_GPS.h>
+#include <GCS_MAVLink.h>
+#include <AP_Vehicle.h>
+#include <DataFlash.h>
+#include <AP_InertialSensor.h>
+#include <AP_Mission.h>
+#include <AP_Terrain.h>
+#include <AP_ADC.h>
+#include <AP_ADC_AnalogSource.h>
+#include <AP_AHRS.h>
+#include <AP_Compass.h>
+#include <AP_Declination.h>
+#include <AP_Airspeed.h>
 #include <AP_HAL_AVR.h>
 #include <AP_HAL_AVR_SITL.h>
 #include <AP_HAL_Linux.h>