wrong property name

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@697020 13f79535-47bb-0310-9956-ffa450edef68

src/etc/performance/dirscanner.xml

@@ -186,7 +186,7 @@ public class DirscannerSetup extends Task {
 
   <target name="many-roots"
           description="only contains include patterns that match starts">
-    <scan test="roots">
+    <scan test="many-roots">
       <patterns>
         <include name="0/"/>
         <include name="0/0/"/>