merge drag upload demo

components/upload/demo/drag-simple.md

-# 拖拽上传
-
-- order: 4
-
-样式简单一些。
-
----
-
-````jsx
-import { Upload, Icon } from 'antd';
-const Dragger = Upload.Dragger;
-
-const props = {
-  name: 'file',
-  showUploadList: false,
-  action: '/upload.do'
-};
-
-ReactDOM.render(
-  <Dragger {...props}>
-    <Icon type="plus" />
-  </Dragger>,
-  mountNode
-);
-````
-
-````css
-#components-upload-demo-drag-simple {
-  width: 246px;
-  height: 146px;
-}
-````

components/upload/demo/drag.md

@@ -13,23 +13,25 @@ const Dragger = Upload.Dragger;
 const props = {
   name: 'file',
   showUploadList: false,
-  action: '/upload.do'
+  action: '/upload.do',
 };
 
 ReactDOM.render(
-  <Dragger {...props}>
-    <p className="ant-upload-drag-icon">
-      <Icon type="inbox" />
-    </p>
-    <p className="ant-upload-text">点击或将文件拖拽到此区域上传</p>
-    <p className="ant-upload-hint">支持单个或批量上传，严禁上传公司内部资料及其他违禁文件</p>
-  </Dragger>,
-  mountNode
-);
-````
-
-````css
-#components-upload-demo-drag {
-  height: 180px;
-}
+<div>
+  <div style={{ width: 246, height: 140 }}>
+    <Dragger {...props}>
+      <Icon type="plus" />
+    </Dragger>
+  </div>
+  <div style={{ marginTop: 16, height: 180 }}>
+    <Dragger {...props}>
+      <p className="ant-upload-drag-icon">
+        <Icon type="inbox" />
+      </p>
+      <p className="ant-upload-text">点击或将文件拖拽到此区域上传</p>
+      <p className="ant-upload-hint">支持单个或批量上传，严禁上传公司内部资料及其他违禁文件</p>
+    </Dragger>
+  </div>
+</div>
+, mountNode);
 ````