update the origin url in the git clone in binary/live
update the origin url in the git clone in binary/live

Having an url that points to a local file on the build machine doesn't
make sense and having a proper url could allow developing and pushing
changes directly from a running image (though that requires more
changes to really work).

matthijskooijman/Debian-Live-config,bizplay/kiosk-os,Webconverger/Debian-Live-config