[VOL-5031] Build and deploy voltha-onos for v2.12

makefiles/*
-----------
  o https://github.com/opencord/onf-make
  o Update to the latest library makefiles to support more lint targets.

VERSION
-------
  o Cosmetic dev version bump to triage build state.

Change-Id: Iaddd825c24afdfa13e99cfd46cfe887072016d0f
diff --git a/makefiles/help/header.mk b/makefiles/help/header.mk
new file mode 100644
index 0000000..021ac0d
--- /dev/null
+++ b/makefiles/help/header.mk
@@ -0,0 +1,6 @@
+# -*- makefile -*-
+
+help :
+	@echo "Usage: make [options] [target] ..."
+	@echo "Targets:"
+	@echo "  help                        This message"