Register libfileset as a datatype

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@272612 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/types/defaults.properties

@@ -13,4 +13,5 @@ regexp=org.apache.tools.ant.types.RegularExpression
 substitution=org.apache.tools.ant.types.Substitution
 xmlcatalog=org.apache.tools.ant.types.XMLCatalog
 extensionSet=org.apache.tools.ant.taskdefs.optional.extension.ExtensionSet
-extension=org.apache.tools.ant.taskdefs.optional.extension.ExtensionAdapter
+extension=org.apache.tools.ant.taskdefs.optional.extension.ExtensionAdapter
+libfileset=org.apache.tools.ant.taskdefs.optional.extension.LibFileSet