-allow use of antlr 3+

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@586281 13f79535-47bb-0310-9956-ffa450edef68

build.xml

@@ -395,9 +395,12 @@
     <available property="commons.net.present"
       classname="org.apache.commons.net.ftp.FTPClient"
       classpathref="classpath"/>
-    <available property="antlr.present"
-      classname="antlr.Tool"
-      classpathref="classpath"/>
+    <condition property="antlr.present">
+  	  <or>
+  	    <available classname="org.antlr.Tool" classpathref="classpath"/>
+  	    <available classname="antlr.Tool" classpathref="classpath"/>
+      </or>
+  	</condition>
     <available property="stylebook.present"
       classname="org.apache.stylebook.Engine"
       classpathref="classpath"/>