Upstream merge of Debian 2.42.1 packaging (no quilt patches)

Source has been updated with changes from git and we use the Debian
packaging data here to match those up.

[endlessm/eos-shell#3276]
@sgnn7 I would really prefer to try and make tracker work with our glib and move your glib update to a separate issue. Updating glib makes the QA for adding tracker essentially become QA our whole platform (even though I have strong trust in glib's stable process). If you already did the work of the glib update, it's just a button press when we're ready to do it.