Japanese translation updates.
Japanese translation updates.

* subversion/po/ja.po: Update translation against r17483 by working on
  untranslated/fuzzy entries added at r17303:17483.  Also, improve
  translation of a message and add a term to the translation dictionary.
  Now ja.po has 1394 translated messages against r17483 (Emacs PO-mode
  status: "1395t157o").


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@857602 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion