.gitignore update
.gitignore update

After running tox some extra files were created.

TrivialFix

Change-Id: I3e5a38abf49cf3b246de436f78137b23154d8101

pombredanne/taskflow-1,jimbobhickville/taskflow,pombredanne/taskflow-1,jimbobhickville/taskflow,openstack/taskflow,junneyang/taskflow,openstack/taskflow,junneyang/taskflow