title: Cocos2d-x android can't resolved coscos2dx library
body: <p>i am starting by macOSX xcode4.5 .<br>
  i tried to tutorials.</p>
  
  <p>Using cocos2dx, it completes building of macOSX,<br /> 
  The problem occurred in android sources. </p>
  
  <p>No contents of cocos2dxActivity are described.<br />
  so, org.cocos2dx.lib is not other files. </p>
  
  <p>android is not running.</p>
  
  <p>i use ndk-r8.
  What will be a problem? </p>