[gitlab] Adding packages to gitlab image

[Ralph Böhme]

Hi!

I'd like to see glib-devel added to out gitlab image, so the new tests for the 
tevent-glib-glue [1] get run in gitlab.

Who can help me with this?

Thanks!
-slow

[1] https://gitlab.com/samba-team/devel/samba/pipelines/52336817

-- 
Ralph Boehme, Samba Team                https://samba.org/
Samba Developer, SerNet GmbH   https://sernet.de/en/samba/
GPG-Fingerprint   FAE2C6088A24252051C559E4AA1E9B7126399E46