android 6.0 remove apache lib solved method

當使用android 6.0進行專案撰寫，6.0版本移除了apache的功能

官網說明如下：
https://developer.android.com/intl/zh-tw/about/versions/marshmallow/android-6.0-changes.html#behavior-apache-http-client

eclipse project solved method

從SDK/platforms/android-23/optional裡頭的org.apache.http.legacy.jar複製到專案的lib資料夾

reference:
http://stackoverflow.com/a/32066606