[ext] echo when generating mavlink headers

Makefile

@@ -254,7 +254,6 @@ $(INTERMCU_MSG_H) : $(MESSAGES_XML) generators
 	$(Q)chmod a+r $@
 
 $(MAVLINK_PROTOCOL_H) :
-	@echo GENERATE $(MAVLINK_DIR)
 	$(Q)make -C $(PAPARAZZI_HOME)/sw/ext mavlink
 
 #

sw/ext/Makefile

@@ -72,6 +72,7 @@ fatfs: fatfs.update
 mavlink: mavlink.update mavlink.build
 
 mavlink.build:
+	@echo GENERATE $(PAPARAZZI_SRC)/var/include/mavlink
 	$(Q)PYTHONPATH=$(EXT_DIR)/mavlink python $(EXT_DIR)/mavlink/pymavlink/tools/mavgen.py --output $(PAPARAZZI_SRC)/var/include/mavlink --lang C $(EXT_DIR)/mavlink/message_definitions/v1.0/paparazzi.xml --no-validate > /dev/null
 
 libsbp: libsbp.update