Fix common_video_unittests in apk_tests.gyp. r5265 moved common_video_unittests to its own gyp, this required an update of apk_tests.gyp that wasn't caught by our trybots. TBR=mflodman@webrtc.org BUG= Review URL: https://webrtc-codereview.appspot.com/5629004 git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@5266 4adac7df-926f-26a2-2b94-8c16560cd09d