UBUNTU: SAUCE: apparmor: Add fine grained mediation of posix mqueues

UBUNTU: SAUCE: apparmor: Add fine grained mediation of posix mqueues

BugLink: https://bugs.launchpad.net/bugs/2012136
BugLink: https://bugs.launchpad.net/bugs/1989983
Add fine grained mediation of posix mqueues. Specifically this patch
adds support for differentiating mqueues based on the name in the ipc
namespace. A follow on patch will add support for implied labels, and
a third patch explicit labels. This is done in part because of
dependencies on other patches to apparmor core.

BugLink: https://bugs.launchpad.net/bugs/1989983
Signed-off-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: Andrea Righi <andrea.righi@canonical.com>