VOL-4846 - Added targets lint-chart & lint-helm

README.md
Makefile
makefiles/lint/helm.mk
makefiles/lint/include.mk
=========================
   * In the quest to stop having jenkins failing jobs post checkin for
     content problems added targets lint-chart & lint-helm which invoke
     commands mentioned in README.md.
   * Logic is currently conditional: make lint-helm UNSTABLE=1, failures
     will need to be cleaned up before the command can be run as a default.

Change-Id: I6b445a6600c283b8068201a006792aeacf5407aa
diff --git a/makefiles/include.mk b/makefiles/include.mk
index aa8c402..e734aeb 100644
--- a/makefiles/include.mk
+++ b/makefiles/include.mk
@@ -24,9 +24,9 @@
 ## -----------------------------------------------------------------------
 help::
 	@echo "USAGE: $(MAKE) [options] [target] ..."
-        # @echo "  test                          Sanity check chart versions"
 
 include $(MAKEDIR)/consts.mk
 include $(MAKEDIR)/lint/include.mk
+include $(MAKEDIR)/variables.mk
 
 # [EOF]