title: invalid resource directory name, drawable-anydpi-v21
body: <p>I would like to build my application and send it over to my samsung tablet using android 4.2.2. But I would like to have my application compatible with newer versions too (i.e. API 23) </p>
  
  <p>I start the application using this command : </p>
  
  <pre><code>react-native run-android
  </code></pre>
  
  <p>When it's building I receive this error, I clean the project twice already with no success. I do not use eclipse or android studio.</p>
  
  <pre><code>:app:processDebugResourcesinvalid resource directory name: D:\Projects\react-native\project\android\app\build\intermediates\res\merged\debug/drawable-anydpi-v21
  </code></pre>
  
  <p>This is a part of the gradle file.</p>
  
  <pre><code>android {
      compileSdkVersion 17
      buildToolsVersion "19.1.0"
  
      defaultConfig {
          applicationId "com.project"
          minSdkVersion 17
          targetSdkVersion 23
          ...
      }
      dependencies {
          compile fileTree(dir: "libs", include: ["*.jar"])
          compile "com.android.support:appcompat-v7:18.0.+"
          compile "com.facebook.react:react-native:+"  // From node_modules
      }
  </code></pre>