[VOL-5308] - bbsim test failure

Makefile
--------
  o Temporary flag USE_LF_MK=1 added to enable library repo:onf-make use.
  o Default behavior will use legacy makefiles from  repo:bbsim/makefiles/.
  o Fixed typo on line 76

lf/include.mk
makefiles/
-------------
  o Transition bridge for using repo:onf-make.
  o Define variable legacy-mk= as bbsim/makefiles/
  o Replace path variable $(MAKEDIR=) with $(legacy-mk).
  o Replace variable $(ONF_MAKEDIR=) with $(legacy-mk).
  o These edits help break dependency on non-library makefiles/ directory.
    allowing repo:onf-make to be used as a transparent replacement.

Change-Id: Ida8c020384cf78ddf19fa6375702429d992d10a1
Signed-off-by: Joey Armstrong <jarmstrong@linuxfoundation.org>
diff --git a/makefiles/lint/doc8/include.mk b/makefiles/lint/doc8/include.mk
index 272479f..affed5f 100644
--- a/makefiles/lint/doc8/include.mk
+++ b/makefiles/lint/doc8/include.mk
@@ -36,7 +36,7 @@
 
 ## -----------------------------------------------------------------------
 ## -----------------------------------------------------------------------
-include $(MAKEDIR)/lint/doc8/excl.mk
+include $(legacy-mk)/lint/doc8/excl.mk
 
 ifdef lint-doc8-excl
   lint-doc8-excl-args += $(addprefix --ignore-path$(space),$(lint-doc8-excl))