libgnomedb support in glade2

[Oliver]

Hi all,

maybe it would be good to provide gnome-db support in glade 2.10 since
it's dependant on libgnomedb anyway. I've added this support simply by
adding

CONFIGURE_ARGS=    --enable-gnome-db

to the port Makefile. Maybe the packing list is not right. Sorry I've
done never prting myself. Should get the details from the Porters
Handbook.

Greetings from vienna
    Oliver