core: Include GType name in log
core: Include GType name in log

And add a FIXME to grl_data_add_for_id() as it needs to handle other
key types too.

Signed-off-by: Victor Toso <39b7599ff73bbf5db531748ba5250f21fa7120ff@gnome.org>

GNOME/grilo,jasuarez/grilo,grilofw/grilo,grilofw/grilo,grilofw/grilo,GNOME/grilo,jasuarez/grilo,jasuarez/grilo