Set the smack label of /dev/mapper and /dev/mapper/control as '*'

Set the smack label of /dev/mapper and /dev/mapper/control as '*'

Normally, /dev/mapper and /dev/mapper/control are created by the in-kernel dm driver
and the smack label is set by Systemd as '*'.
When the dm driver is loaded as a module (dm-mod.ko), however,
/dev/mapper's label cannot be initialized by Systemd.

drwxr-xr-x root root * /dev/mapper
crw------- root root * /dev/mapper/control

Change-Id: I74f7b58cbfb80294bb19bd5cff683359d26c1b22
Signed-off-by: Hyotaek Shim <hyotaek.shim@samsung.com>