docs(jqLite): clarify that Debug Data must be enabled for scope/isola…

…teScope methods

Closes #9515
Closes #10123

src/jqLite.js

@@ -87,10 +87,12 @@
  * `'ngModel'`).
  * - `injector()` - retrieves the injector of the current element or its parent.
  * - `scope()` - retrieves the {@link ng.$rootScope.Scope scope} of the current
- * element or its parent.
+ * element or its parent. Requires {@link guide/production#disabling-debug-data Debug Data} to
+ * be enabled.
  * - `isolateScope()` - retrieves an isolate {@link ng.$rootScope.Scope scope} if one is attached directly to the
  * current element. This getter should be used only on elements that contain a directive which starts a new isolate
  * scope. Calling `scope()` on this element always returns the original non-isolate scope.
+ * Requires {@link guide/production#disabling-debug-data Debug Data} to be enabled.
  * - `inheritedData()` - same as `data()`, but walks up the DOM until a value is found or the top
  * parent element is reached.
  *