Japanese translation updates.
Japanese translation updates.

* subversion/po/ja.po: Update translation against r19568 by working on
  an untranslated entry added at r19434:19568.  Also, improve
  translation of some messages and add 1 term to the translation
  dictionary.
  Now ja.po has 1471 translated messages against r19568 (Emacs PO-mode
  status: "1472t209o").


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@859643 13f79535-47bb-0310-9956-ffa450edef68

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