This prevents samples from building on unix.

See unix builds here:
   http://jfx.sfbay.sun.com/hudson/job/franca-integration/
 before build #46 in which vijay disabled building of samples to get the build to succeed.

The classpath comes from <jfx>/desktop.properties. This file uses ; to separate classpath elements.
javafxpackager executes javafxc commands using this classpath.