add initial test case for Javascript like all other (failing) test cases

js/spec/gilded_rose_spec.js

@@ -1,7 +1,9 @@
 describe("Gilded Rose", function() {
 
-  it("should do something", function() {
-    update_quality
+  it("should foo", function() {
+    items = [ new Item("foo", 0, 0) ];
+    update_quality();
+    expect(items[0].name).toEqual("fixme");
   });
 
 });