vdl/javascript: Change the generator to use the new package layout.
vdl/javascript: Change the generator to use the new package layout.

Change-Id: I75283255aee60da09064ba3f87d068d569bdfbff

vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref,vanadium/go.ref