Try once again to use target venv-activate-script

This branch will need to be rebased before merging, as we're going
along a fairly circuitous route.

Signed-off-by: Eric Ball <eball@linuxfoundation.org>
Change-Id: Ib13fcd0aa2ea4e48efd25a7abd152e216c1e104f
diff --git a/makefiles/virtualenv.mk b/makefiles/virtualenv.mk
index c5c0ba7..6b781e3 100644
--- a/makefiles/virtualenv.mk
+++ b/makefiles/virtualenv.mk
@@ -43,6 +43,7 @@
 ##    o place on the right side of colon as a target dependency
 ##    o When the script does not exist install the virtual env and display.
 ## ----------------------------------------------------------------------
+venv-activate-script: $(venv-activate-script)
 $(venv-activate-script):
 	@echo
 	@echo "============================="