Fix svnsync_tests 29 for BDB.  This also fixes the assert in svnrdump_tests 35 for BDB although the test still fails.
Fix svnsync_tests 29 for BDB.  This also fixes the assert in
svnrdump_tests 35 for BDB although the test still fails.

* subversion/libsvn_repos/replay.c
  (add_subdir): Get copyfrom for replaced children if not already known.

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