AP_Baro: examples: fix coding style

libraries/AP_Baro/examples/BARO_generic/BARO_generic.cpp

@@ -2,9 +2,9 @@
   generic Baro driver test
  */
 
-#include <AP_HAL/AP_HAL.h>
 #include <AP_Baro/AP_Baro.h>
 #include <AP_BoardConfig/AP_BoardConfig.h>
+#include <AP_HAL/AP_HAL.h>
 
 const AP_HAL::HAL &hal = AP_HAL::get_HAL();
 
@@ -13,6 +13,9 @@ static AP_Baro barometer;
 static uint32_t timer;
 static uint8_t counter;
 
+void setup();
+void loop();
+
 void setup()
 {
     hal.console->printf("Barometer library test\n");