QtWebKit_Examples: Change repository name to qtwebkit-examples.git

This has been discussed on
http://lists.qt-project.org/pipermail/releasing/2013-March/001177.html



Change-Id: I33a10b11ac32e385843ee2b24923fa5ed5701553
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@digia.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Simo Fält <simo.falt@digia.com>