Update repository to use repo:onf-make/makefiles

.gitmodules
Makefile
config.mk -> lf/config.mk
lf/include.mk
lf/local/include.mk
lf/onf-make
makefiles/README.md
-------------------------
  o Initial staging to remove per-repository makefiles/ directory.
  o Add repo:onf-make as a git submodule.
  o lf/include.mk is central access for loading all library logic.
  o lf/local/ replaces $(sandbox-root)/makefiles.

*.groovy, *.sh, *.yaml
----------------------
  o Include source edits to force pipeline to rebuild.
  o Added SPDX copyright notice tokens.

Change-Id: Ia6b95880e720956d01af2c5966f7ae5d0f4c13b1
diff --git a/.gitmodules b/.gitmodules
index c815615..c0cb8ec 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -7,3 +7,6 @@
 [submodule "packer/common-packer"]
 	path = packer/common-packer
 	url = https://github.com/lfit/releng-common-packer.git
+[submodule "lf/onf-make"]
+	path = lf/onf-make
+	url = http://gerrit.opencord.org/onf-make