UBUNTU: SAUCE: apparmor: flock mediation is not being enforced on cache check

UBUNTU: SAUCE: apparmor: flock mediation is not being enforced on cache check

When an open file with cached permissions is checked for the flock
permission. The cache check fails and falls through to no error instead
of auditing, and returning an error.

For the fall through to do a permission check, so it will audit the
failed flock permission check.

BugLink: http://bugs.launchpad.net/bugs/1658219
Signed-off-by: John Johansen <john.johansen@canonical.com>
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>