Added solution (#27127)

curriculum/challenges/english/02-javascript-algorithms-and-data-structures/es6/use-export-to-reuse-a-code-block.english.md

@@ -62,6 +62,8 @@ window.exports = function(){};
 <section id='solution'>
 
 ```js
-// solution required
+"use strict";
+export const foo = "bar";
+export const bar = "foo";
 ```
 </section>