Prepare for better device categorization by moving everything to testing
subdir first.
[skip-ci]: chicken-egg problem: passing pmaports CI depends on pmbootstrap MR
depends on this MR
Related: postmarketos#16
As mentioned in #151, the Raspberry Pi Zero doesn't have an ethernet
port, so this makes it quite complicated to connect to the device from
a fresh install, because wifi/bluetooth/serial/... are not configured.
With this new package, the device starts with the microUSB configured as
ethernet and the dhcpd is running on the RPI, so you can simply connect
it to a computer and connect with SSH in order to configure it.
