[Clocks/Timers] Make $scope available

...to methods of TimerController

platform/features/clock/src/controllers/TimerController.js

@@ -122,6 +122,7 @@ define(
                 active = false;
             });
 
+            this.$scope = $scope;
             this.signValue = '';
             this.textValue = '';
             this.updateObject = updateObject;