add 分割线 review by daiqiang

@@ -74,6 +74,8 @@ export default class GroupProductCell extends React.Component {
                     </View>
                   </View>
                 </View>
+                <View style={styles.line}/>
+
               </TouchableOpacity>
           </View>
         );
@@ -204,4 +206,10 @@ let styles = StyleSheet.create({
         height: 1,
         backgroundColor: '#b0b0b0',
     },
+    line: {
+      width,
+      height: 1,
+      marginLeft: 15*DEVICE_WIDTH_RATIO,
+      backgroundColor: '#E0E0E0',
+    },
 });