VOL-4977 - Failure in voltha-protos verification job.

Makefile
--------
 o This patch contains prototyping.
 o Define DISTUTILS_DEBUG to enable verbose output from python pkg install.
 o Define DOCKER_DEBUG to enable docker --debug.
 o Added whitespace to improve make output readability.
 o Insert banner text into targets so they will announce themselves for logging.
 o Remove @/$(HIDE) from prototype generation so command will be visible.

makefiles/docker/include.mk
---------------------------
 o Conditionally test for stdin and explicity pass --tty so docker can pass back log output.

.gitignore
----------
Ignore the virtualenv directory.

Change-Id: If73870fec03eadef2671f3f2f33075d58327914d
diff --git a/makefiles/include.mk b/makefiles/include.mk
index 3cdbf2c..2ce93de 100644
--- a/makefiles/include.mk
+++ b/makefiles/include.mk
@@ -35,6 +35,7 @@
 include $(MAKEDIR)/help/include.mk
 
 include $(MAKEDIR)/consts.mk
+include $(MAKEDIR)/etc/include.mk
 include $(MAKEDIR)/virtualenv.mk
 
 include $(MAKEDIR)/help/variables.mk