title: What is the proper way to get Android NDK version
body: <p>I'm wondering how can I get android ndk version.
  I've installed ndk on my mac here:
  ~/Library/Android/sdk/ndk-bundle 
  but it seems there is nothing capable to inform me about the version of this bundle.</p>
  
  <p>By analyzing this script
  <a href="https://gist.github.com/jorgenpt/1961404" rel="nofollow noreferrer">https://gist.github.com/jorgenpt/1961404</a>
  I've came to conclusion that there should be RELEASE.TXT file (since r5), however it doesn't exist...</p>
  
  <p>source.properties seems to contain some useful info (like this: Pkg.Revision = 21.0.6113669
  ), but how can I convert it to readable and meaningful values (r19c or r20b, for example)?</p>