doc: Add 'rbd' to the parameter of backingstore in Japanese lxc-create(1)
doc: Add 'rbd' to the parameter of backingstore in Japanese lxc-create(1)

Signed-off-by: KATOH Yasufumi <512423cb3a4857a38f472862b51e4ab1a1730f06@jazz.email.ne.jp>
Acked-by: Stéphane Graber <089afc6d81f66f1168a9849e15660feae286e024@ubuntu.com>

thmo/lxc,ysbnim/lxc,tych0/lxc,QingweiPeterLan/cs188-lxc,thmo/lxc,hfuCN/lxc,ss1h2a3tw/lxc,caglar10ur/lxc,cjwatson/lxc,ss1h2a3tw/lxc,Distrotech/lxc,QingweiPeterLan/cs188-lxc,hallyn/lxc,tych0/lxc,bostjan/lxc,cjwatson/lxc,hfuCN/lxc,terceiro/lxc,GreatFruitOmsk/lxc,akshaykarle/lxc,federicobriata/lxc,LynxChaus/lxc,federicobriata/lxc,thmo/lxc,terceiro/lxc,Distrotech/lxc,GreatFruitOmsk/lxc,hallyn/lxc,ysbnim/lxc,tych0/lxc,akshaykarle/lxc,caglar10ur/lxc,terceiro/lxc,aeris/lxc,GreatFruitOmsk/lxc,aeris/lxc,cjwatson/lxc,QingweiPeterLan/cs188-lxc,ss1h2a3tw/lxc,LynxChaus/lxc,Distrotech/lxc,hfuCN/lxc,federicobriata/lxc,akshaykarle/lxc,LynxChaus/lxc,bostjan/lxc,caglar10ur/lxc,hallyn/lxc,ysbnim/lxc,aeris/lxc,bostjan/lxc