Unreviewed. New GTK baseline for media/media-controls-clone.html.

* platform/gtk/TestExpectations: Removed from the expectations.
* platform/gtk/media/media-controls-clone-expected.png:
* platform/gtk/media/media-controls-clone-expected.txt: New
baseline.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@168275 268f45cc-cd09-0410-ab3c-d52691b4dbfc