add rebuild makefile target and rebuild script

Change-Id: Id956c1693d0d29ca79e2483f37a048b47b3731bd
diff --git a/frontend/Makefile b/frontend/Makefile
index 1a7a1f1..4ae7094 100644
--- a/frontend/Makefile
+++ b/frontend/Makefile
@@ -57,6 +57,10 @@
 containers: prereqs download_xos
 	make -f ../common/Makefile.containers xos_devel synchronizer onboarding_synchronizer
 
+rebuild:
+	bash ../common/rebuild.sh $(XOS_BOOTSTRAP_PORT)
+	bash ../common/wait_for_onboarding_ready.sh $(XOS_BOOTSTRAP_PORT) xos
+
 stop:
 	test ! -s $(DOCKER_COMPOSE_YML) || sudo docker-compose -p $(DOCKER_PROJECT) -f $(DOCKER_COMPOSE_YML) stop
 	sudo docker-compose -p $(BOOTSTRAP_PROJECT) -f $(BOOTSTRAP_YML) stop