Make sure includeEmptyDirs attribute of <delete> does what it promises.

forgot to save this file - again.
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git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@268829 13f79535-47bb-0310-9956-ffa450edef68

WHATSNEW

@@ -26,6 +26,9 @@ Fixed bugs:
 
 * <style>'s style attribute no handles absolute paths correctly.
 
+* <delete includeemptydirs="true"> now deletes more than just the leaf
+  directories.
+
 Changes from Ant 1.2 to Ant 1.3
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