title: Could not find an option named "split-per-abi"
body: <p>Please what version of flutter support the <code>--split-per-abi</code> option when building an APK file with <code>flutter build apk</code>. I am making use of <code>Flutter 1.5.4-hotfix.2</code> and still can't access that option.<br>
  According to the documentation <a href="https://flutter.dev/docs/deployment/android" rel="noreferrer">Preparing an Android app for release</a>,   </p>
  
  <blockquote>
    <p>This command results in two APK files:</p>
  
  <pre><code>&lt;app dir&gt;/build/app/outputs/apk/release/app-armeabi-v7a-release.apk
  &lt;app dir&gt;/build/app/outputs/apk/release/app-arm64-v8a-release.apk
  </code></pre>
    
    <p>Removing the --split-per-abi flag results in a fat APK that contains
    your code compiled for all the target ABIs. Such APKs are larger in
    size than their split counterparts, causing the user to download
    native binaries that are not applicable to their device’s
    architecture.  </p>
  </blockquote>
  
  <p>How can I make it work?</p>
  
  <p><strong>EDIT:</strong> It works on <code>Flutter 1.7.4</code></p>