Fix classpath to make unit tests run in etc/build.xml test target

(dependency jars were missing; possibly this wasn't detected because
others had those jars in $ANT_HOME/lib or jre/lib/ext or such?)


git-svn-id: https://pmd.svn.sourceforge.net/svnroot/pmd/trunk@1752 51baf565-9d33-0410-a72c-fc3788e3496d

pmd/etc/build.xml

@@ -71,7 +71,7 @@
 <target name="test" depends="compile">
     <junit printsummary="yes" haltonfailure="yes">
       <classpath>
-        <pathelement location="${build}" />
+        <path refid="classpath.path" />
         <pathelement location="${test-data}" />
         <pathelement location="${basedir}" />
       </classpath>