CLJS-645: parse-ns needs to include 'constants-table as a dep
CLJS-645: parse-ns needs to include 'constants-table as a dep

Did not having the constants-table as an implicit dependency on all
namespaces if cljs.analyzer/*track-constants* true. Minor refactor of
the logic in both compile-file* and parse-ns

mstang/clojurescript,mstang/clojurescript,mstang/clojurescript