Added a line to build.xml to echo the value of $ANT_OPTS after

being burned one too many times by having it already set in my
environment.  What was the motivation for that change again?
In any case this should make it easier to notice.

git-svn-id: http://lampsvn.epfl.ch/svn-repos/scala/scala/trunk@19925 5e8d7ff9-d8ef-0310-90f0-a4852d11357a

build.xml

@@ -180,6 +180,7 @@ PROPERTIES
        but if it is unset it will take this default value. -->
   <property name="env.ANT_OPTS" value="-Xms512M -Xmx1024M -Xss1M -XX:MaxPermSize=128M" />
   <!--  to find max heap usage: -Xaprof ; currently at 980M for locker.comp -->
+  <echo message="Using ANT_OPTS: ${env.ANT_OPTS}" />
 
   <property
       name="scalacfork.jvmargs"