Add a ton of patches needed to get the port building with libc++.
One of them is a patch I got into Qt some time ago, but patch-libcxx is a
collection of commits to WebKit itself (and a few changes of mine) that
never got downstream Qt's copy of WebKit.
Some good soul with free time should work on porting qtwebkit-23 , which
contains a much more up-to-date WebKit checkout.