Since fanotify has decided to be careful about alignment and packing
rather than rely on __attribute__((packed)) for multiarch support.
Since this attribute isn't doing anything on fanotify_response we just
drop it.  This does not break API/ABI.
Suggested-by: NTvrtko Ursulin <tvrtko.ursulin@sophos.com>
Signed-off-by: NEric Paris <eparis@redhat.com>