Comment 10 for bug 922578

Last I checked, a chroot was still in the same network namespace as the host, meaning that "nameserver 127.0.0.1" reaches the dnsmasq running outside of the chroot and will resolve just fine.

Besides the fact that /etc/resolv.conf contains 127.0.0.1 is in no way a result of the change to resolvconf, that's the switch to dnsmasq by default in Network Manager (and only affects desktop machines).