UBUNTU: SAUCE: Fix aufs calling of security_path_mknod

UBUNTU: SAUCE: Fix aufs calling of security_path_mknod

BugLink: http://launchpad.net/bugs/724456

The security_path_mknod hook requires an encoded 'dev' for its 'dev' paramet
but aufs is calling security_path_mknod with a 'dev' that was already
converted by 'new_decode_dev(dev)'.  However security_path_mknod and its
consumer TOMOYO is expecting 'dev' rather than 'new_decode_dev(dev)'.

This will result in TOMOYO doing new_decode_dev(new_decode_dev(dev))
(which is wrong) when security_path_mknod() is called from aufs' vfsub_mknod

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: Andy Whitcroft <apw@canonical.com>