RFC: Gitlab CI for barebox

[Antony Pavlov]

Hi!

I have made simple Gitlab CI for barebox.

Gitlab CI runner setup instruction and
the source for Debian 11 docker image can be found at:

  https://gitlab.com/frantony/barebox-gitlab-ci-runner

Sample gitlab-ci.yaml config file:

  https://gitlab.com/frantony/barebox/-/commit/b1ed597d8e67c8f76f4f98cd1c6605b936cf2471

Corresponding gitlab pipeline results:

  https://gitlab.com/frantony/barebox/-/pipelines/459422690


Some notes:

  * there are several "images size > maximum size" errors during 'build ARM'
  * fake firmware blobs for ARM are used
  * 'build doc' produces sphinx generated html docs archive artifact
  * 'build ARM/MIPS/RISC-V/X86/sandbox' produce log/ directory archive artifacts
  * no support for kvx, openrisc and powerpc

@Ahmad

I suppose we can add your qemu barebox/test/emulate.pl tests into CI.

-- 
Best regards,
  Antony Pavlov