fix af_unix tests for v8 networking.

Merged John Johansen requested to merge jjohansen/apparmor:fix-af_unix-tests into master

The unix network tests are not being run on a v8 network capable kernel. Under v8 there needs to be some adjustments to the tests because unix rules get downgraded to the socket rule network unix, which does not have the same set of conditionals or fine grained permissions, meaning some tests that would fail under af_unix (like missing permission tests) will pass under v8 network rules.

Signed-off-by: John Johansen