title: ndk build error for Ninja CMAKE_MAKE_PROGRAM is not set
body: <p>I download ndk cmake and LLDB for ndk development.And then I create an project with 
  c++ code，the application compiled error.</p>
  
  <pre><code>CMake Error: CMake was unable to find a build program corresponding to "Ninja".  CMAKE_MAKE_PROGRAM is not set.  You probably need to select a different build tool.
  
  ...
  
  Configuration failed.
  External native generate JSON debug: JSON generation completed with problem
  FAILURE: Build failed with an exception.
  
  \* What went wrong:
  Execution failed for task ':app:generateJsonModelDebug'.
  com.android.ide.common.process.ProcessException: Error configuring
  </code></pre>