just another ant caching issue.

This patch actually doesn't solve the problem. It works
around with our current data. Probably we have to separate
the build of the module docs (<modulesynopsis>)
*sigh*


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@96945 13f79535-47bb-0310-9956-ffa450edef68