QObject is fairly tightly coupled to QAPI these days, and I've been
effectively maintaining it together with QAPI for a while.  Update
MAINTAINERS to reflect that.
Signed-off-by: NMarkus Armbruster <armbru@redhat.com>
Message-Id: <1475084022-30117-3-git-send-email-armbru@redhat.com>
Acked-by: NLuiz Capitulino <lcapitulino@redhat.com>