include cljs.reader in hello sample for Closure Module testing purposes

Author: dnolen

samples/hello/src/hello/core.cljs

@@ -1,5 +1,6 @@
 (ns hello.core
-  (:require [hello.foo.bar :as bar]))
+  (:require [hello.foo.bar :as bar]
+            [cljs.reader :as reader]))
 
 (defn ^{:export greet} greet [n]
   (str "Hello " n))