[Translators] Japanese translation update for vlc-1.2.0

[Fumio Nakayama]

Hi Christophe,

I updated Japanese translation. (for "POT-Creation-Date: 2012-02-13 00:43+0100")
$ LANG=C msgfmt --statistics -v -o vlc.mo ja.po
5848 translated messages.

Here is the latest po file.
http://www.n6a.net/vlc/1.2.0-pre/ja.po

regards,
Fumio Nakayama