gitlab-ci.yml: Add some missing dependencies to the jobs

Let's make sure that all jobs have proper "needs:" statements so that
they can start as soon as possible, without having to wait for the
previous pipeline stage to finish.

Message-Id: <20210311142211.1547864-3-thuth@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>