postcreate.sh: xattr support for Deb8+/Ubu15+

Newer distros tend to switch from using suid bit to extended attributes.
Apparently, Debian 8 and Ubuntu 15.04 (and later versions) follow the
herd. Fix postcreate.sh accordingly.

Signed-off-by: Kir Kolyshkin <kir@openvz.org>
1 file changed