Fix for out of tree AppArmor 3 patches.

BugLink: http://bugs.launchpad.net/bugs/1408833

Fix 2 issues around the mediation of file base unix domain sockets.
* Add auditing of deleted/shutdown file based unix domains sockets so
  that the denials can be correctly evalated.
* fix the permission request mask so that it is correct for the
  deleted/shutdown socket case.
Signed-off-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: Leann Ogasawara <leann.ogasawara@canonical.com>
Signed-off-by: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>