Call wdt_reset() before bootloader timeout

Bootloader timeout is 20 seconds. The watchdog timeout is 8 seconds.
This was causing the user application to never be reached after a reset
with no upload.

hardware/ariadne/bootloaders/ariadne/main.c

@@ -129,9 +129,9 @@ int main(void)
 				resetTick();
 				// Unset tftp flag
 				tftpFlashing = FALSE;
-				wdt_reset();
 			}
 		}
+		wdt_reset();
 		/* Blink the notification led */
 		updateLed();
 	}