Bug#1115332: glib-d: fails to build with glib 2.86

[Marco Trevisan]

> The only depending application is appstream-generator, which doesn't 
> seem to mention DesktopAppInfo or UnixAnything, so I think fixing
> glib-d 
> is likely to be enough.

Yeah, we seem to be fine: https://codesearch.debian.net/search?q=Gio.%28Unix%7Cunix_%7CDesktopAppInfo%29.*+pkg%3Aappstream-generator&literal=0

Feel free to upload that patch then, I'm unlikely to be able to do it
shortly sadly.