README: add google doodle for new years 2017

README.md

 # Google Hosts
+[![doodle]][doodle-story]
+
+[doodle]: https://www.google.com/logos/doodles/2017/new-years-eve-2017-5093547849023488-2xa.gif "新年快乐!"
+[doodle-story]: https://www.google.com/search?ie=UTF-8&q=New%20Year%27s%20Eve%202017&oi=ddle&ct=new-years-eve-2017-5093547849023488-lawcta&hl=en&kgmid=%2Fm%2F01pl3y
 
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