Add script to ensure virtual webcam is running.

This script will check that a webcam is running and start it if it's
not currently running.
It's tailored to the way our buildbots are currently configured.

TEST=local execution on Windows, Mac and Linux.
BUG=none
R=phoglund@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/1406005

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@3981 4adac7df-926f-26a2-2b94-8c16560cd09d
1 file changed