java 6 has "rt.jar" instead of "core.jar"

releng.control/localBuildExample/runbuild.properties

@@ -10,6 +10,6 @@ J2SE-1.5=${env.JAVA_5_HOME}/jre/lib/rt.jar:${env.JAVA_5_HOME}/jre/lib/jsse.jar
 # some standard ones for IBM's JRE
 #J2SE-1.4=${env.JAVA_4_HOME}/jre/lib/core.jar:${env.JAVA_4_HOME}/jre/lib/xml.jar:${env.JAVA_4_HOME}/jre/lib/graphics.jar:${env.JAVA_4_HOME}/jre/lib/server.jar:${env.JAVA_4_HOME}/jre/lib/ibmorbapi.jar:${env.JAVA_4_HOME}/jre/lib/security.jar
 #J2SE-1.5=${env.JAVA_5_HOME}/jre/lib/core.jar:${env.JAVA_5_HOME}/jre/lib/vm.jar:${env.JAVA_5_HOME}/jre/lib/xml.jar:${env.JAVA_5_HOME}/jre/lib/graphics.jar:${env.JAVA_5_HOME}/jre/lib/server.jar:${env.JAVA_5_HOME}/jre/lib/ibmorbapi.jar:${env.JAVA_5_HOME}/jre/lib/security.jar
-#export JavaSE-1.6=${JAVA_6_HOME}/jre/lib/core.jar:${JAVA_6_HOME}/jre/lib/vm.jar:${JAVA_6_HOME}/jre/lib/xml.jar:${JAVA_6_HOME}/jre/lib/graphics.jar:${JAVA_6_HOME}/jre/lib/server.jar:${JAVA_6_HOME}/jre/lib/ibmorbapi.jar:${JAVA_6_HOME}/jre/lib/security.jar
+#export JavaSE-1.6=${JAVA_6_HOME}/jre/lib/rt.jar:${JAVA_6_HOME}/jre/lib/vm.jar:${JAVA_6_HOME}/jre/lib/xml.jar:${JAVA_6_HOME}/jre/lib/graphics.jar:${JAVA_6_HOME}/jre/lib/server.jar:${JAVA_6_HOME}/jre/lib/ibmorbapi.jar:${JAVA_6_HOME}/jre/lib/security.jar
 
 # Other Execution Environment classpaths should be added, if/when we need them