update util-linux homepage
The old homepage is abandoned: not updated since 2014.
Wikipedia gives two URLs for util-linux "homepage".
One is just a directory list, and another is cgit.
I think cgit is more like a homepage.
git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@12173 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689