title: Android NDK: WARNING: APP_PLATFORM android-9 is larger than android:minSdkVersion 8
body: <p>I am getting the following warning when compiling my cocos2d-x project with cygwin.</p>
  
  <pre><code>`/cygdrive/e/project/MyGame/proj.android `
  /cygdrive/e/android-ndk-r8e/build/core/add-application.mk:128: Android NDK: WARNING:APP_PLATFORM android-9 is larger than android:minSdkVersion 8 in ./AndroidManifest.xml
  </code></pre>
  
  <p>I am using NDK version r8e. My minimum SDK version is 8 in my AndroidManifest.xml but i do not specify APP_PLATFORM as android-9 anywhere. How can i change this to 8.</p>
  
  <p>Can anyone tell me how to solve this warning as I think this may cause issues. </p>