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.
Guide for connecting to wlan is on the wiki page for the device, wifi
chip is BCM4334. Wlan interfaces are wlan0 and p2p0. Connection seems
stable, was able to install some packages.
