Add talk owners to migrated talk folders

BUG=N/A
R=niklas.enbom@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/15309004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@7001 4adac7df-926f-26a2-2b94-8c16560cd09d