ra_serf: Pass up pending errors if we run into an problem during update (like a checksum mismatch); otherwise, include the error code for reference.
ra_serf: Pass up pending errors if we run into an problem during update (like a
checksum mismatch); otherwise, include the error code for reference.

* subversion/libsvn_ra_serf/update.c
  (finish_report): Return a pending error if we have one; otherwise, create
  a wrapped error and include the status code.

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