title: Wait for another ANT build/task to finish
body: <p>I would like to make ANT process wait for another build or task to finish.</p>
  
  <p>The situation is: I execute a few ANT builds simultaneously. In these builds there are  tasks to test the apps. Unfortunately, only one flexunit task can be run at the same time, because it uses net socket to communicate with the AIR app. </p>
  
  <p>The build process should wait for the end of the  tasks from other build processes before starting its  task.</p>
  
  <p>How to achieve that?</p>
  
  <p>Thank you for any hints,</p>
  
  <p>Rafal</p>