[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/lint/python.mk b/makefiles/lint/python.mk
index 9252657..d3fe4fd 100644
--- a/makefiles/lint/python.mk
+++ b/makefiles/lint/python.mk
@@ -1,6 +1,18 @@
 # -*- makefile -*-
 # -----------------------------------------------------------------------
-# Copyright 2022 Open Networking Foundation (ONF) and the ONF Contributors
+# Copyright 2022-2023 Open Networking Foundation (ONF) and the ONF Contributors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 # -----------------------------------------------------------------------
 
 ##-------------------##
@@ -26,14 +38,16 @@
 endif
 
 ## -----------------------------------------------------------------------
+## Intent: Perform a lint check on makefile sources
 ## -----------------------------------------------------------------------
 lint-python:
 	$(HIDE)$(env-clean) $(python-check-find) \
 	    | $(xargs-n1) $(python-check) $(python-check-args)
 
 ## -----------------------------------------------------------------------
+## Intent: Display command help
 ## -----------------------------------------------------------------------
-help ::
-	@echo '  lint-python                   Syntax check python sources'
+help-summary ::
+	@echo '  lint-python         Syntax check python sources (*.py)'
 
 # [EOF]