doc: update Japanese lxc-user-nic manpage
doc: update Japanese lxc-user-nic manpage

Update for commit db74bbd

Signed-off-by: KATOH Yasufumi <512423cb3a4857a38f472862b51e4ab1a1730f06@jazz.email.ne.jp>

hallyn/lxc,hallyn/lxc,ss1h2a3tw/lxc,hallyn/lxc,ss1h2a3tw/lxc,ss1h2a3tw/lxc