Add glaznev@ to OWNERS for webrtc/modules/video_capture and talk/app/webrtc.

Review URL: https://webrtc-codereview.appspot.com/20659004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6436 4adac7df-926f-26a2-2b94-8c16560cd09d