ekncontent: Chain up in EkncQueryResults finalize
ekncontent: Chain up in EkncQueryResults finalize

If we don't do this, we leak memory.

https://phabricator.endlessm.com/T19625

endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib