Use renderSeparator in List View Example

Summary: Closes https://github.com/facebook/react-native/pull/5443

Reviewed By: svcscm

Differential Revision: D2856259

Pulled By: androidtrunkagent

fb-gh-sync-id: 68b4f5d16c852bbf06cd65346c32b8c6d3f2d36c

Examples/UIExplorer/ListViewExample.js

@@ -57,6 +57,7 @@ var ListViewSimpleExample = React.createClass({
           dataSource={this.state.dataSource}
           renderRow={this._renderRow}
           renderScrollComponent={props => <RecyclerViewBackedScrollView {...props} />}
+          renderSeparator={(sectionID, rowID) => <View key={`${sectionID}-${rowID}`} style={styles.separator} />}
         />
       </UIExplorerPage>
     );
@@ -74,7 +75,6 @@ var ListViewSimpleExample = React.createClass({
               {rowData + ' - ' + LOREM_IPSUM.substr(0, rowHash % 301 + 10)}
             </Text>
           </View>
-          <View style={styles.separator} />
         </View>
       </TouchableHighlight>
     );