Reverted to old slightly-less-broken scheme for guessing SVN revision number.

git-svn-id: http://lampsvn.epfl.ch/svn-repos/scala/scala/trunk@9838 5e8d7ff9-d8ef-0310-90f0-a4852d11357a

build.xml

@@ -138,7 +138,14 @@ INITIALISATION
       <contains string="${java.version}" substring="1.4"/>
     </condition>
   <!-- Finding out SVN revision -->
-    <exec executable="svnversion" outputproperty="svn.number"/>
+    <loadfile
+      property="entries"
+      srcFile="${basedir}/.svn/entries"
+      failonerror="false"/>
+    <propertyregex
+      property="svn.number" input="${entries}" select="\1"
+      regexp="revision=\042([0-9]*)\042\.*"
+      defaultValue="x"/>
     <property name="init.avail" value="yes"/>
   <!-- Printing out some information about what environment I am running in -->
     <echo level="info"