[Translators] updated japanese po file

[Fumio Nakayama]

Hello,

I updated po.file of vlc-1.1.11 for Japanese.

LANG=C msgfmt --statistics -v -o vlc.mo ja.po
5469 translated messages.

Here is the latest ja.po file.
http://www.n6a.net/vlc/1.1.11/ja.po

Please update the file.

best regards,
Fumio