On systemd-based operating systems that don't
use /etc/sysconfig/network-scripts
dhcp-all-interfaces configures 'lo' for dhcp.
This causes errors and fails networking.target
causing system-wide issues. This change excludes
'lo' at dhcp-all-interfaces udev rules level.
Closes-bug: #1621501
Change-Id: I7563b766827bedbea7ae1de35e5bdfcbf1fc0d1e
Co-Authored-By: Jeremy Stanley <fungi@yuggoth.org>