docker: checkpatch: add missing dependency
Traceback (most recent call last): File "/builds/linux-media/users/hverkuil/scripts/spdxcheck.py", line 11, in import git ModuleNotFoundError: No module named 'git' WARNING: added, moved or deleted file(s), does MAINTAINERS need updating?
Signed-off-by: Ricardo Ribalda ribalda@chromium.org