Fix favicon request 404 error

wxsms · web-flow · commit ea6de46c49ca · 2018-01-09T16:50:11.000+08:00
This is causing chart not displaying in Android release bundle sometimes.
diff --git a/src/components/Echarts/tpl.html b/src/components/Echarts/tpl.html
@@ -1,6 +1,7 @@
 <!DOCTYPE html>
 <html>
   <head>
+    <link rel="shortcut icon" href="data:image/x-icon;," type="image/x-icon"> 
     <title>echarts</title>
     <meta http-equiv="content-type" content="text/html; charset=utf-8">
     <style type="text/css">
