Updated Mac build of llqtwebkit, with javascript window.close handling.

Built from:

revision aacdf69cbf5aa12d77c179296e31ef643ed1ef4a in http://qt.gitorious.org/+lindenqt/qt/lindenqt (currently head of the 'lindenqt' branch)
revision feff21029074 in http://bitbucket.org/lindenlab/llqtwebkit/ (currently head of the default branch)