Use the device's architecture instead of noarch. Because the device
packages should never be built for other architectures, even if all
depends can be built for other arches as well.
This simplifies package building as part of the new build
infrastructure effort.
pmbootstrap has also been changed to output this by default in
aportgen.
The ASUS MeMO Pad FHD 10 (ME302KL) is kinda like an enlarged version
of flo, all the unofficial Lineage / TWRP work has been derived from
flo. So eventually it should run mainline :) but let's start with this.
