Push the no_new_privs logic into the per profile transition fns, so
that the no_new_privs check can be done at the ns level instead of the
aggregate stack level.

BugLink: http://bugs.launchpad.net/bugs/1648143Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Tim Gardner <tim.gardner@canonical.com>
Acked-by: Brad Figg <brad.figg@canonical.com>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>