title: CircleCI Android constraintLayout doesn't work
body: <p>I am now using the <strong>CircleCI</strong> for my project. Also I am implementing the new <strong>constraintLayout</strong> in my project. Now I am stuck with the CircleCI building. It shows me this when <strong>gradle -dependencies</strong> run:</p>
  
  <pre><code>File /home/ubuntu/.android/repositories.cfg could not be loaded.
  FAILURE: Build failed with an exception.
  
  * What went wrong:
  A problem occurred configuring project ':app'.
  &gt; You have not accepted the license agreements of the following SDK components:
    [com.android.support.constraint:constraint-layout:1.0.0-alpha3, com.android.support.constraint:constraint-layout-solver:1.0.0-alpha3].
    Before building your project, you need to accept the license agreements and complete the installation of the missing components using the Android Studio SDK Manager.
    Alternatively, to learn how to transfer the license agreements from one workstation to another, go to http://d.android.com/r/studio-ui/export-licenses.html
  </code></pre>
  
  <p>Here is my configuration in .yml file:</p>
  
  <pre><code>#Install android build tools, platforms
  #Supported versions here https://circleci.com/docs/android
  machine:
      java:
          version: openjdk8
      environment:
          ANDROID_HOME: /usr/local/android-sdk-linux
  
  dependencies:
      pre:
          - echo y | android list sdk
          - echo y | android update sdk --no-ui --all --filter "tools"
          - echo y | android update sdk --no-ui --all --filter "platform-tools"
          - echo y | android update sdk --no-ui --all --filter "build-tools-24.0.0"
          - echo y | android update sdk --no-ui --all --filter "android-24"
          - echo y | android update sdk --no-ui --all --filter "extra-google-m2repository"
          - echo y | android update sdk --no-ui --all --filter "extra-google-google_play_services"
          - echo y | android update sdk --no-ui --all --filter "extra-android-support"
          - echo y | android update sdk --no-ui --all --filter "extra-android-m2repository"
          - (./gradlew -version):
                      timeout: 360
      override:
          #- ANDROID_HOME=/usr/local/android-sdk-linux ./gradlew dependencies
          - export TERM="dumb"; if [ -e ./gradlew ]; then ./gradlew clean dependencies -stacktrace;else gradle clean dependencies -stacktrace;fi
  
  #Pull any submodules
  checkout:
    post:
      - git submodule init
      - git submodule update
  
  #-PdisablePreDex is a must else gradle just dies due to memory limit
  #Replace
  test:
      override:
          - (./gradlew assemble -PdisablePreDex):
              timeout: 360
          - cp -r ${HOME}/${CIRCLE_PROJECT_REPONAME}/app/build/outputs/apk/ $CIRCLE_ARTIFACTS
          - emulator -avd circleci-android22 -no-audio -no-window:
              background: true
              parallel: true
          # wait for it to have booted
          - circle-android wait-for-boot
          # run tests  against the emulator.
          - ./gradlew connectedAndroidTest
  
  #Deploy when tests pass
  deployment:
      #production:
      #    branch: master
      #    commands:
      #        - (./gradlew clean assembleRelease crashlyticsUploadDistributionRelease -PdisablePreFex):
      #            timeout: 720
  
      staging:
          branch: staging
          commands:
               - (./gradlew clean assembleStaging crashlyticsUploadDistributionStaging -PdisablePreFex):
                  timeout: 720
  </code></pre>
  
  <p>I checked in the build log when </p>
  
  <pre><code>echo y | android update sdk --no-ui --all --filter "extra-android-m2repository"
  </code></pre>
  
  <p>command run and here is the result:</p>
  
  <pre><code>November 20, 2015
  Do you accept the license 'android-sdk-license-c81a61d9' [y/n]: 
  Installing Archives:
    Preparing to install archives
    Downloading Android Support Repository, revision 33
    Installing Android Support Repository, revision 33
      Installed Android Support Repository, revision 33
    Done. 1 package installed.
  </code></pre>
  
  <p>And my classpath is:</p>
  
  <pre><code>classpath 'com.android.tools.build:gradle:2.2.0-alpha4'
  </code></pre>
  
  <p>I am not sure what I've done incorrectly or is there anything I need to add more. Please suggest.
  Thanks. </p>