embed-optional will build optiona-dynprop.jar containing the dynamic
properties and XMLDOM.
Main will just display a message - the hooks are not needed with ant1.6,
only for ant1.5. ( the component helper is not yet in 1.6, but
it's easier )
git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@273724 13f79535-47bb-0310-9956-ffa450edef68