Incorrect import reference of emptyFunction causes error when importi…

Summary:
Experimental component SwipeableListView fails to import due to incorrect import reference.  Followed example use of import of emptyFunction found in https://github.com/facebook/react-native/blob/master/Libraries/Components/TextInput/TextInput.js#L31
Closes #7954

Differential Revision: D3394202

fbshipit-source-id: db8ddc9d9635878f0ce1fb969ef6c6e3c27d63f3

Libraries/Experimental/SwipeableRow/SwipeableRow.js

@@ -31,7 +31,7 @@ const View = require('View');
 
 const {PropTypes} = React;
 
-const emptyFunction = require('emptyFunction');
+const emptyFunction = require('fbjs/lib/emptyFunction');
 
 // Position of the left of the swipable item when closed
 const CLOSED_LEFT_POSITION = 0;