re-link update to build

build/update are the only two build modes now

i'm on a crusade to reduce the number
of files and directories, and reduce the number
of source lines, while not reducing functionality

Signed-off-by: Leah Rowe <leah@libreboot.org>

Signed-off-by: Leah Rowe <leah@libreboot.org>

Signed-off-by: Leah Rowe <leah@libreboot.org>

call these as functions, instead of executing scripts

Signed-off-by: Leah Rowe <leah@libreboot.org>

general code cleanup, but a few exit commands were also
wrong. for example, relying on listitems to always return
zero status and then calling lbmk_exit 1

Signed-off-by: Leah Rowe <leah@libreboot.org>

Instead of having detailed error messages, run most
commands through a function that calls err() under
fault conditions.

Where detail is still required, err() is still called
manually. Where it isn't, the error message is simply
whatever command was executed to cause the error.

This results in a massive sloccount reduction for lbmk;
specifically, 178 sloc reduction, or a 8.1% reduction.
The total sloccount is now 2022, for shell scripts.

Signed-off-by: Leah Rowe <leah@libreboot.org>

Signed-off-by: Leah Rowe <leah@libreboot.org>

also, some of them were out of date; years now updated.

Signed-off-by: Leah Rowe <leah@libreboot.org>

This results in much cleaner copyright and license declarations.
SPDX headers are legally recognised and make auditing easier.

Also, remove descriptions of each script, from each script.
Libreboot documentation at docs/maintain/ describes them.

Signed-off-by: Leah Rowe <leah@libreboot.org>

Signed-off-by: Leah Rowe <leah@libreboot.org>