I think that for the most of the platforms, the Target Setup contains
almost similar 'Preparing the binaries' subsections.

I'd like to see those made generic, much like the existing instructions
on connecting to the targets in various ways.

There should be subsections describing how to build both stubs and
RedBoot, with instructions for both GUI and CLI. The only things that
would differ is the target name, and for the RedBoot build, where to
find the file that should be imported.

It should be possible to add a little more detail than in the present
descriptions, for instance that the size of the image can be reduced
by removing some unnecessary packages... Come to think of it, we should
probably make .ecm files for stubs as well and thus get a much simpler
and consistent method for building stubs/redboot and docs to match.

But it'd take some time to orchestrate, hence this bug.