Update .gitignore

This patch[1] already explains why updating .gitignore

[1]https://review.openstack.org/#/c/466356/

Change-Id: I172ef064c1ce1ebdab96ada429276b89a0211e5b
Depends-On: Ifeaaa14c63158d0318218ca62ee41e98fc4c0b57
Co-Authored-By: Alex Schultz <aschultz@redhat.com>

.gitignore

@@ -8,7 +8,8 @@ coverage/
 .idea/
 *.swp
 *.iml
-openstack/
+/openstack
+/log
 
 # Files created by releasenotes build
 releasenotes/build