make it use selinux_add_opt() and avoid separate copies - gather
non-LSM options by memmove() in place
Reviewed-by: David Howells <dhowells@redhat.com>
Change-Id: I883b006f54c6e7faf73fe4728cf28ea19109690f
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>