title: Your APP_BUILD_SCRIPT points to an unknown file using Android ndk-build
body: <p>I get the following error while trying to compile an Android NDK project:</p>
  
  <pre><code>ndk-build 
  Android NDK: Your APP_BUILD_SCRIPT points to an unknown file: /home/lambergar/work/APIExample/jni/Android.mk    
  /home/lambergar/android/ndk/android-ndk-r5c/build/core/add-application.mk:116: *** Android NDK: Aborting...    .  Stop.
  </code></pre>
  
  <p>The weird thing is, that the 'unknown file' (Android.mk) exists under the path reported as invalid.</p>