Bug 1097742 followup - add comma to fix syntax error. r=me

browser/components/loop/test/desktop-local/roomViews_test.js

@@ -65,7 +65,7 @@ describe("loop.roomViews", function () {
         roomState: ROOM_STATES.INIT,
         audioMuted: false,
         videoMuted: false,
-        failureReason: undefined
+        failureReason: undefined,
         foo: "bar"
       });
     });