Comment 3 for bug 735505

Thanks Mario.

According to the man page we can do something like the following:

               ubuntu_804="Ubuntu
               8.04"
               if [ -x /usr/bin/lsb_release ]; then
                 if [ "$(/usr/bin/lsb_release -sir)" == "${ubuntu_804}" ]; then
                   OBSOLETE_BY="2.6.25"
                 fi
               fi

This is more or less what we need. I'll add the logic to nvidia and fglrx.