title: NDK build with different mk file for release/debug
body: <p>We have a setup where our Android game contains a few native libraries that get built using ndk-build.</p>
  
  <p>Our project contains the following structure:</p>
  
  <pre><code>Root
   |
   |-- jni
        |
        |-- Android.mk   // $include ( lib.mk ) and ( photon/photon.mk)
        |-- lib.mk
        |-- photon
              |
              |----- photon.mk
              |----- debug_android_armeabi.mk
              |----- release_android_armeabi.mk
  </code></pre>
  
  <p>One of the libs that get built (Photon) comes with 2 additional makefiles besides its main one - one for debug and one for release.</p>
  
  <p>My question is - how can i pass this info to ndk-build such that the correct additional mk file will be picked up when building?</p>