个人中线消息列表样式调整，review by 红魔

@@ -79,6 +79,7 @@ export default class MsgCenterNormalCell extends React.Component {
                         <Image
                             defaultSource={require('../../images/message/duihuakuang.png')}
                             style={styles.bubble}
+                            resizeMode='stretch'
                         >
                             <Text style={styles.reply}
                                 numberOfLines={1}
@@ -174,7 +175,6 @@ let styles = StyleSheet.create({
         backgroundColor:'white',
         flexDirection:'row',
         // justifyContent: 'center',
-        resizeMode:'contain',
         alignItems:'center',
         height:40,
         padding:10,