hack/make: ignore failure to stop apparmor
```
---> Making bundle: .integration-daemon-stop (in bundles/test-integration)
++++ cat bundles/test-integration/docker.pid
+++ kill 13137
+++ /etc/init.d/apparmor stop
Leaving: AppArmorNo profiles have been unloaded.
Unloading profiles will leave already running processes permanently
unconfined, which can lead to unexpected situations.
To set a process to complain mode, use the command line tool
'aa-complain'. To really tear down all profiles, run 'aa-teardown'."
script returned exit code 255
```
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(cherry picked from commit 5dbfae694919b1aff76f360061b4065349bf1900)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>