[Libvir] [PATCH] fix the Japanese messages

Hi, We are making a review of the Japanese messages. And we fix Japanese help messages first. Signed-off-by: Saori Fukuta <fukuta.saori@jp.fujitsu.com>, Minoru Takata <takata.minoru@jp.fujitsu.com> Best regards, Saori Fukuta Minoru Takata