AP_HAL: fixed example build

libraries/AP_HAL/examples/Printf/Printf.pde

@@ -18,6 +18,10 @@
 #include <AP_Param.h>
 #include <AP_Progmem.h>
 #include <AP_Math.h>
+#include <AP_AHRS.h>
+#include <AP_Airspeed.h>
+#include <AP_Vehicle.h>
+#include <AP_ADC_AnalogSource.h>
 
 const AP_HAL::HAL& hal = AP_HAL_BOARD_DRIVER;
 

libraries/AP_HAL_PX4/examples/simple/simple.pde

@@ -26,6 +26,10 @@
 #include <AP_Declination.h>
 #include <SITL.h>
 #include <AP_Notify.h>
+#include <AP_AHRS.h>
+#include <AP_Airspeed.h>
+#include <AP_Vehicle.h>
+#include <AP_ADC_AnalogSource.h>
 
 const AP_HAL::HAL& hal = AP_HAL_BOARD_DRIVER;