qubes-core-agent-networking package brings in new systemd units, which
needs to be enabled. Standard %systemd_post macro handles it only on
initial installation, but not on update. The function that handle
updates is in %post of qubes-core-agent-systemd package. To avoid
duplication, simply enforce proper installation order, instead of
modifying %post of qubes-core-agent-networking package.
OrderWithRequires influences only ordering, but does not introduce
actual dependency, so it's still possible to not install
qubes-core-agent-networking package.
Fixes 0e0c229 "rpm: enable qubes-network-uplink.service on install"
a28a381469