Project does not build for aarch64 (Pi Zero 2)

[Chris Crocker-White]

Currently the project does not build if you select the Pi Zero 2 (or other aarch64 device) as your default device type in balenaCloud.

The way to get it to work at the moment is to set the default device type for the balenaCloud application to the Zero 1 (as you would have done before), then add a Zero 2 to the Zero 1 application. This way the builders build for the 32 bit architecture of the Zero 1 but it still runs on the Zero 2 (64 bit) as it's backward compatible. I will look into the changes necessary to update the project to make it build for 64 bit architectures.