Add control of capturing output into u_boot_pylib and the tools which
use it.

Signed-off-by: Simon Glass <sjg@chromium.org>

Move this file into U-Boot's Python library, so that it is no-longer
part of patman.

This makes a start on:

https://source.denx.de/u-boot/custodians/u-boot-dm/-/issues/35

Signed-off-by: Simon Glass <sjg@chromium.org>

Use this to control info and debugging messages. Enable them if -v is
given.

Signed-off-by: Simon Glass <sjg@chromium.org>

With Python versions older than 3.9 Buildman produces an error on
start-up. Fix this with a workaround for importlib.

There is already a workaround for v3.6 but I am not sure if that is still
functioning.

Signed-off-by: Simon Glass <sjg@chromium.org>

Enable measuring test coverage for buildman so we can see the gaps. It is
currently at 68%.

Signed-off-by: Simon Glass <sjg@chromium.org>

Convert this file to snake case and update all files which use it.

Signed-off-by: Simon Glass <sjg@chromium.org>

Use argparse to parse the arguments, since OptionParser is deprecated now.

Signed-off-by: Simon Glass <sjg@chromium.org>

Convert this file to snake case and update all files which use it.

Signed-off-by: Simon Glass <sjg@chromium.org>

This does not need any of the control features. Move it out of main to
reduce the size of the do_buildman() function.

For Python 3.6 the -H feature will not work, but this does not seem to be
a huge problem, as it dates from 2016.

Signed-off-by: Simon Glass <sjg@chromium.org>

Convert this file to snake case and update all files which use it.

Signed-off-by: Simon Glass <sjg@chromium.org>