Update to Java commit cf9fb27 (2014.08.29): CLJ-1325 - Warn on boxed math when *unchecked-math* is set
Update to Java commit 7977b49 (2014.08.29): Add clojure.core/update, like update-in but takes a single key
Update to Java commit 20191d1 (2014.08.29): fix CLJ-1241
Fix typo in commit to add clojure.core.update