HAL_Empty: fixed example build

libraries/AP_HAL_Empty/examples/empty_example/empty_example.pde

@@ -1,17 +1,19 @@
 
+#include <AP_HAL.h>
 #include <AP_Common.h>
 #include <AP_Progmem.h>
 #include <AP_Param.h>
 #include <AP_Math.h>
 
-#include <AP_HAL.h>
 #include <AP_HAL_AVR.h>
 #include <AP_HAL_AVR_SITL.h>
 #include <AP_HAL_Empty.h>
 
 const AP_HAL::HAL& hal = AP_HAL_BOARD_DRIVER;
 
-void setup() {}
+void setup() {
+	hal.console->println_P(PSTR("Empty setup"));
+}
 void loop() {}
 
 AP_HAL_MAIN();