8140802: Clean up and refactor of class loading code for CDS

Reviewed-by: jiangli, acorn
diff --git a/modules.xml b/modules.xml
index 94b55f7..1d5d8bf 100644
--- a/modules.xml
+++ b/modules.xml
@@ -340,6 +340,7 @@
       <to>java.sql</to>
       <to>java.sql.rowset</to>
       <to>jdk.scripting.nashorn</to>
+      <to>jdk.vm.cds</to>
     </export>
     <export>
       <name>sun.reflect.annotation</name>