fix missing "/" in path

conf/vanilla/autoload_configs/java.conf.xml

 <configuration name="java.conf" description="Java Plug-Ins">
   <javavm path="/opt/jdk1.6.0_04/jre/lib/amd64/server/libjvm.so"/>
   <options>
-    <option value="-Djava.class.path=$${script_dir}freeswitch.jar:$${script_dir}/example.jar"/>
+    <option value="-Djava.class.path=$${script_dir}/freeswitch.jar:$${script_dir}/example.jar"/>
     <option value="-agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=0.0.0.0:8000"/>
   </options>
   <startup class="org/freeswitch/example/ApplicationLauncher" method="startup"/>