[appledoc] Enable explicit crossrefs.

Fix warnings for existing `@see ...` crossrefs.

AsyncDisplayKit/Details/ASRangeController.h

@@ -37,7 +37,7 @@ typedef struct {
 /**
  * Notify the receiver that the visible range has been updated.
  *
- * @see -rangeControllerVisibleNodeIndexPaths:
+ * @see [ASRangeControllerDelegate rangeControllerVisibleNodeIndexPaths:]
  */
 - (void)visibleNodeIndexPathsDidChange;