Add current webkit-gtk

Signed-off-by: Jeremy Huddleston Sequoia <jeremyhu@apple.com>
webkit-gtk: Update to 1.11.4

Signed-off-by: Jeremy Huddleston Sequoia <jeremyhu@apple.com>
webkit-gtk: Remove comment about broken jit as it's working now

Signed-off-by: Jeremy Huddleston Sequoia <jeremyhu@apple.com>