Use new api-versioned name for geocode-glib

geocode-glib has changed the name of the pkg-config file
to include the api version. Update configure script accordingly.

See:
https://git.gnome.org/browse/geocode-glib/commit/?id=1cadaa879b7d72d973880680b5f947fd5c275974
"pkg-config: Version the pkg-config file"

https://bugzilla.gnome.org/show_bug.cgi?id=706020
Use new GeocodeLocation API in geocode-glib 0.99.1

Use new accessor functions. The location structure members has been hidden.
Use regular g_object_unref, since the geocode_location_free has been
removed.

See:
https://git.gnome.org/browse/geocode-glib/commit?id=5372f2f7ff97707dcc839bd3ed79ea9f289f7409
"lib: Turn GeocodeLocation into a proper GObject"

https://bugzilla.gnome.org/show_bug.cgi?id=706020