title: Travis.yml ./gradlew : Permission denied
body: <p>Using <strong>Travis CI</strong> for an existing Android project calling </p>
  
  <pre><code>$ ./gradlew build connectedCheck
  </code></pre>
  
  <p>I get this error:</p>
  
  <pre><code>/home/travis/build.sh: line 45: ./gradlew: Permission denied
  The command "./gradlew build connectedCheck" failed and exited with 126 during .
  </code></pre>