On the log-addressing branch: Follow-up to r1516322.
Update all hard-coded checksums.

* subversion/libsvn_fs_fs/fs_fs.c
  (write_revision_zero): use new checksum values in r0 template

* subversion/libsvn_subr/checksum.c
  (fnv1a_32x4_empty_string_digest_array): update

git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/log-addressing@1516665 13f79535-47bb-0310-9956-ffa450edef68