libgda upgrade

[Joerg Sonnenberger <joerg%britannica.bec.de@localhost>]

Hi all,
I'd like to fix Anjuta, but the easiest approach is an update for a
couple of years of missing changes. This requires a newer libgda and
that in turn currently breaks:
(1) databases/mercheant
(2) devel/gnome-build

The former is dead upstream and there is a newer visualisation tool
available. Haven't checked the latter. Do we care about the old libgda
and libgnome-db?

Joerg