that controls implicit copying of references - i.e. we don't copy
anything by default.
Try to copy a clone before copying the real object.
inheritRefs="true" doesn't make any sense for <antcall> as all
references of the calling project will be defined in the new project
and wouldn't be overwritten. That's why <antcall> didn't even get
this attribute.
git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@270136 13f79535-47bb-0310-9956-ffa450edef68
