Updated dune files

Author: vouillon

lib/dune

@@ -8,6 +8,8 @@
    (:standard
     (:include cflags.sexp))))
  (js_of_ocaml
+  (javascript_files runtime.js))
+ (wasm_of_ocaml
   (javascript_files runtime.js)
   (wasm_files runtime.wat)))