[gentoo-user] Execute udev rule before net.* scripts

[Grant]

I'm trying to define names for my USB network interfaces keyed on the
interface location instead of the interface MAC address.  This udev
rule renames one of them:

SUBSYSTEM=="net", KERNEL=="enp3s0u1", NAME="net0"

But it doesn't work automatically at boot, I have to execute 'udevadm
trigger --action=add'.  How can I execute that before the net.*
scripts at boot?

- Grant