title: Travis CI can't create a directory for Android SDK
body: <p>I setup the enviorment for Travis CI and added the .travis.yml to my Source Folder: </p>
  
  <pre><code>language : android
  
  jdk: oraclejdk7
  
  android:
   components:
      - build-tools-19.1.0
  
      # The SDK version used to compile the project
      - android-19
  
      - extra-google-google_play_services
      - extra-google-m2repository
      - extra-android-m2repository
      - addon-google_apis-google-19
  
  
  
  
  before_install:
    - chmod +x gradlew
  
  install:
    - true
  
  script: ./gradlew assembleDebug
  </code></pre>
  
  <p>Travis always download the build-tools etc. but it fails on rename the directory. The output is each time the same: </p>
  
  <blockquote>
    <p>Installing Archives:</p>
    
    <p>Preparing to install archives</p>
    
    <p>Downloading SDK Platform Android 4.4.2, API 19, revision 4</p>
    
    <p>Installing SDK Platform Android 4.4.2, API 19, revision 4</p>
    
    <p>Failed to rename directory /usr/local/android-sdk/platforms/android-19 to /usr/local/android->sdk/temp/PlatformPackage.old01.</p>
    
    <p>Failed to create directory /usr/local/android-sdk/platforms/android-19</p>
    
    <p>Done. Nothing was installed.</p>
  </blockquote>
  
  <p>I know Travis CI for Android is beta.</p>
  
  <p><strong>Edit:</strong></p>
  
  <p>I probably know the issue. The problem is because of the SDK 19 is already installed, furthermore I only have to install the build-tools.</p>