Add "*.swo" to ".gitignore" file
Add "*.swo" to ".gitignore" file

Change-Id: Ia94bbf64f955f3da453df8903a23be32ba9be8de

openstack/openstack-manuals,openstack/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,openstack/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,openstack/openstack-manuals