Japanese translation updates.
Japanese translation updates.

* subversion/po/ja.po: Update translation against r20928 by working on
  an untranslated entry added at r20887:20928.
  Now ja.po has 1484 translated messages against r20928 (Emacs PO-mode
  status: "1485t+232o").

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