Two warnings, SC2034 and SC2178, pop up very often with the references
- shellcheck handles them poorly and produces a ton of bogus warnings
about them. Silence the warnings and drop most of the "shellcheck
disable" clauses.
There used to be a possibility to override used SDK image per
architecture, but the need for it disappeared once SDK images started
to contain the initial form of board rootfs for both amd64 and
arm64. This eliminated problems with cyclic dependencies errors
popping up while gather the package reports. So with this change it is
now only possible to specify just one SDK image to use for any
arch. This feature is not used all that often anyway.
This adds some scripts I have been using for over a year to deal with
the weekly package updates.
It comes with a `README.md` which describes a workflow similar to my
own.
The `sync_packages.sh` and `update_packages.sh` scripts are currently
not used anywhere. The idea behind them was to use them for Github
Action, but that will come as a follow-up PR.
