Depend on GLib 2.24
Depend on GLib 2.24

Gabble doesn't strictly require GLib 2.24 (as far as I'm aware), but the
required telepathy-glib does, so it seems simpler to make that version
a hard dependency; we're certainly not going to fix any incompatibilities
with older GLib in this branch.

Ziemin/telepathy-gabble,mlundblad/telepathy-gabble,jku/telepathy-gabble,jku/telepathy-gabble,Ziemin/telepathy-gabble,Ziemin/telepathy-gabble,mlundblad/telepathy-gabble,jku/telepathy-gabble,Ziemin/telepathy-gabble,mlundblad/telepathy-gabble