add test for angular.d.ts

angularjs/angular.d.ts

@@ -1001,9 +1001,9 @@ declare module ng {
         link?:
             (scope: IScope,
             instanceElement: IAugmentedJQuery,
-            instanceAttributes: IAttributes,
-            controller: any,
-            transclude: ITranscludeFunction
+            instanceAttributes?: IAttributes,
+            controller?: any,
+            transclude?: ITranscludeFunction
             ) => void;
         name?: string;
         priority?: number;