Add --with-tests to autorun.sh. Now, just execute: "BUILD/autorun.sh -w"
or "BUILD/autorun.sh --with-tests" to get the same effect as
"BUILD/autorun.sh --stop-stage=autoconf;./configure --with-tests"

Change-Id: I17207968c45d586cc968eb5d424d1776e25fd92d
Signed-off-by: Scott Mann <smann@noironetworks.com>