[VOL-5342] - Install repo:onf-make as a git submodule

.gitmodules
.pre-commit-config.yaml
Makefile
 config.mk
lf/README.md
lf/config.mk
lf/include.mk
lf/local/include.mk
lf/onf-make
lf/transition.mk
makefiles/include.mk
makefiles/lint/include.mk
-------------------------
  o Added transition.mk -- bridge logic for migrating to repo:onf-make.
  o Updated a few paths in makefiles/ to use latest lint and virtualenv
    makefiles to workaround some warnings and failures in the case of lint.

Change-Id: I1b5d3e46d57e427950ee772a4555f5f75a817417
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..758cef6
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "lf/onf-make"]
+	path = lf/onf-make
+	url = https://github.com/opencord/onf-make.git