Ev2 shims: Add a no-op shim callback registration function for ra_local.
Ev2 shims: Add a no-op shim callback registration function for ra_local.

* subversion/libsvn_ra_local/ra_plugin.c
  (svn_ra_local__register_editor_shim_callbacks): New.
  (ra_local_vtable): Add new callback to the vtable.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion