Fix the getRowData method of SwipeableListViewDataSource in SwipeableListView

Summary:
This is simple fix to SwipeableListView. According to SwipeableListViewDataSource, the only method available is cloneWithRowsAndSections. If you try to get the data from a SwipeableListView, without this fix it won't work. This change fixes the problem so that SwipeableListView can work correctly.
Closes #8493

Differential Revision: D3523384

fbshipit-source-id: 359ff274fabcab676ed6dee24f0652c4146cde69

Author: sscaff1

Libraries/Experimental/SwipeableRow/SwipeableListView.js

@@ -52,7 +52,7 @@ const SwipeableListView = React.createClass({
   statics: {
     getNewDataSource(): Object {
       return new SwipeableListViewDataSource({
-        getRowData: (data, sectionID, rowID) => data[rowID],
+        getRowData: (data, sectionID, rowID) => data[sectionID][rowID],
         getSectionHeaderData: (data, sectionID) => data[sectionID],
         sectionHeaderHasChanged: (s1, s2) => s1 !== s2,
         rowHasChanged: (row1, row2) => row1 !== row2,