[VOL-5321] - Add repo:onf-make as a git submodule.

Makefile
lf/transition.mk
----------------
  o Add bridge logic to conditionally load legacy makefiles or repo:onf-make.
  o transition.mk allows logic to gradually be replaced.
  o makefiles/ directory can eventually be removed after all
    dependencies on local makefile logic have been removed.

makefiles/
----------
  o Replace make var(s) ONF_MAKEDIR= and ONF_MAKE= with var legacy-mk=.

makefiles/commands/include.mk
makefiles/commands/kail/godownloader.sh
---------------------------------------
  o Replace loading legacy kail logic with library makefiles.
  o Git submodule scripts contain linting cleanup for scripts.

Signed-off-by: Joey Armstrong <jarmstrong@linuxfoundation.org>
Change-Id: I152251039fc3b330ed1a6729922e465c53d00879
diff --git a/makefiles/lint/shellcheck/include.mk b/makefiles/lint/shellcheck/include.mk
index 329ce8d..5d7309b 100644
--- a/makefiles/lint/shellcheck/include.mk
+++ b/makefiles/lint/shellcheck/include.mk
@@ -22,11 +22,11 @@
 ##--------------------##
 ##---]  INCLUDES  [---##
 ##--------------------##
-# include $(ONF_MAKEDIR)/lint/shellcheck/help.mk
-include $(ONF_MAKEDIR)/lint/shellcheck/find_utils.mk
+# include $(legacy-mk)/lint/shellcheck/help.mk
+include $(legacy-mk)/lint/shellcheck/find_utils.mk
 
 # Standard lint-yaml targets
-include $(ONF_MAKEDIR)/lint/shellcheck/shellcheck.mk
+include $(legacy-mk)/lint/shellcheck/shellcheck.mk
 
 mk-include--onf-lint-shellcheck := true#        # Flag to inhibit re-including