Bug#1127449: Please add support for arithmetic-encoded JPEGs to loupe

[Albert Nash]

> Please file an issue upstream with glycin asking then to support this with links to the zune-image PRs.

Glycin already has an open issue for this: https://gitlab.gnome.org/GNOME/glycin/-/work_items/179, so opening yet another issue with glycin might bother the upstream developers more than necessary. So I kindly ask for understanding that I simply added a new comment there: https://gitlab.gnome.org/GNOME/glycin/-/work_items/179#note_2812229 ; please feel free to comment more there if necessary.