[VOL-5341] - Install repo:onf-make as a git submodule

.gitmodules
.pre-commit-config.yaml
Makefile
lf/README.md
lf/config.mk
lf/include.mk
lf/local/include.mk
lf/onf-make
lf/transition.mk
makefiles-orig/include.mk
makefiles-orig/lint/include.mk
makefiles/config.mk
makefiles/include.mk
------------------------------
  o Setup bridge logic transition.mk, git submodule
    checkout dependency.  A makefile include from
    the library will trigger submodule checkout.
  o Massage some make variable paths so we can load
    current logic from lf/onf-make/makefiles VS voltha-docs/makefiles.
  o Disable target lint-doc8, variables used in target logic
    conflict with lint-doc8 logic in lf/onf-make.
    Temporary edit until the dependency can be broken.

Signed-off-by: Joey Armstrong <jarmstrong@linuxfoundation.org>
Change-Id: I815ba16f856c32135aef1c563e2d04e38bbdc263
Signed-off-by: Joey Armstrong <jarmstrong@linuxfoundation.org>
diff --git a/.gitmodules b/.gitmodules
index b524402..91b2143 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "makefiles/onf-lib"]
 	path = makefiles/onf-lib
 	url = https://github.com/opencord/onf-make.git
+[submodule "lf/onf-make"]
+	path = lf/onf-make
+	url = https://github.com/opencord/onf-make.git