toy-indexing.xml: Update to start building gometa

Change-Id: I4db3b644afb59543241db562ea685e805945739a
Reviewed-on: http://review.couchbase.org/43586
Reviewed-by: Sarath Lakshman <sarath@couchbase.com>
Tested-by: Sarath Lakshman <sarath@couchbase.com>