fix[litemall-wx]: data应该设置关键字n内容，而不是关键字项。

litemall-wx/pages/search/search.wxml

@@ -14,7 +14,7 @@
       <image class="icon" bindtap="clearHistory" src="http://nos.netease.com/mailpub/hxm/yanxuan-wap/p/20150730/style/img/icon-normal/del1-93f0a4add4.png"></image>
     </view>
     <view class="b">
-      <view class="item" bindtap="onKeywordTap" data-keyword="{{item}}" wx:for="{{historyKeyword}}" wx:key="keyword" hover-class="navigator-hover">{{item.keyword}}</view>
+      <view class="item" bindtap="onKeywordTap" data-keyword="{{item.keyword}}" wx:for="{{historyKeyword}}" wx:key="keyword" hover-class="navigator-hover">{{item.keyword}}</view>
     </view>
   </view>
   <view class="search-keywords search-hot" wx:if="{{!keyword && hotKeyword.length}}">