trailblazer is a bleeding edge, unstable target for EFI capable ARM64
devices. It runs linux-next and should otherwise be adjusted to support
as many devices as possible.

The goal of trailblazer is to motivate more upstream kernel development by
providing a tighter feedback loop (patches land in -next weeks before they
make it into mainline or stable), as well as encouraging more generic
solutions to the device specific hacks we have in userspace.

On supported devices, trailblazer should reflect the current state of
upstream. It allows users to easily appreciate what feature are
unavailable, and more importantly appreciate when a new feature does get
added upstream.

Due to the instability of linux-next, the plan is to have BPO build
trailblazer images nightly, so if next breaks then the images should
only be broken for a day.

Signed-off-by: Caleb Connolly <caleb@postmarketos.org>