Added LICENSE.txt to META-INF of distributable JAR's per jakarta-general suggestions.

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@270596 13f79535-47bb-0310-9956-ffa450edef68

build.xml

@@ -349,16 +349,20 @@
           depends="build"
           description="--> creates the Apache Ant jars">
 
+    <copy file="LICENSE" tofile="${build.dir}/LICENSE.txt"/>
+    
     <jar file="${build.lib}/${name}.jar"
          basedir="${build.classes}"
          manifest="${manifest}">
       <exclude name="org/apache/tools/ant/taskdefs/optional/**" />
+      <metainf dir="${build.dir}" includes="LICENSE.txt"/>
     </jar>
 
     <jar file="${build.lib}/optional.jar"
          basedir="${build.classes}"
          manifest="${manifest}">
       <include name="org/apache/tools/ant/taskdefs/optional/**" />
+      <metainf dir="${build.dir}" includes="LICENSE.txt"/>
     </jar>
 
   </target>