update ant build

[git-p4: depot-paths = "//depot/code/antlr4/main/": change = 9047]

build.xml

@@ -1,4 +1,16 @@
 <?xml version="1.0" encoding="UTF-8"?>
+
+<!--
+
+Make build.properties like this:
+
+version=4.0ea
+
+antlr3.jar=/usr/local/lib/antlr-3.4-complete.jar
+ant-antlr3.jar=${ant.library.dir}/ant-antlr3.jar
+build.sysclasspath=ignore
+-->
+
 <project name="ANTLR4" default="distribute" basedir=".">
 
     <property file="build.properties" />
@@ -35,14 +47,17 @@
 			<arg value="ANTLRParser.g"/>
 			<arg value="ANTLRLexer.g"/>
 			<arg value="ActionSplitter.g"/>
-			<arg value="ASTVerifier.g"/>
 			<arg value="ATNBuilder.g"/>
+			<arg value="BlockSetTransformer.g"/>
+			<arg value="GrammarTreeVisitor.g"/>
+			<arg value="LeftRecursiveRuleWalker.g"/>
 			<classpath>
 				<pathelement location="${antlr3.jar}"/>
 				<pathelement path="${java.class.path}"/>
 			</classpath>
 		</java>
 
+<!--
 		<echo>semantics grammars</echo>
 		<java classname="org.antlr.Tool" fork="true" failonerror="false" maxmemory="300m"
 			dir="${basedir}/tool/src/org/antlr/v4/semantics">
@@ -57,6 +72,7 @@
 				<pathelement path="${java.class.path}"/>
 			</classpath>
 		</java>
+		-->
 
 		<echo>codegen grammars</echo>
 		<java classname="org.antlr.Tool" fork="true" failonerror="false" maxmemory="300m"

tool/src/org/antlr/v4/parse/ASTVerifier.g

@@ -65,7 +65,6 @@ options {
 */
 package org.antlr.v4.parse;
 import org.antlr.v4.tool.*;
-import org.antlr.v4.runtime.tree.CommonTree; // use updated v4 one not v3
 }
 
 @members {

tool/src/org/antlr/v4/parse/ATNBuilder.g

@@ -62,7 +62,6 @@ options {
 package org.antlr.v4.parse;
 import org.antlr.v4.tool.*;
 import org.antlr.v4.automata.ATNFactory;
-import org.antlr.v4.runtime.tree.CommonTree; // use updated v4 one not v3
 }
 
 @members {

tool/src/org/antlr/v4/parse/GrammarTreeVisitor.g

@@ -76,7 +76,6 @@ options {
  */
 package org.antlr.v4.parse;
 import org.antlr.v4.tool.*;
-import org.antlr.v4.runtime.tree.CommonTree; // use updated v4 one not v3
 import java.lang.reflect.Method;
 }