CLJS-742: Compilation with :output-file option set fails

The coll? check on compiler input(s) would incorrectly permit
non-sequential collections to pass through instead of being wrapped
by a vector. Change the check to sequential?

src/clj/cljs/closure.clj

@@ -1450,7 +1450,7 @@
                                 (concat
                                   (apply add-dependencies all-opts
                                     (concat
-                                      (if (coll? compiled) compiled [compiled])
+                                      (if (sequential? compiled) compiled [compiled])
                                       (when (= :nodejs (:target all-opts))
                                         [(-compile (io/resource "cljs/nodejs.cljs") all-opts)])))
                                   (when (= :nodejs (:target all-opts))