infect.h includes compel.h, and compel.h includes infect.h.
Surely, due to include guards it will be sorted out, but
we'd rather just include what we need.

travis-ci: success for compel uapi cleanups
Signed-off-by: Kir Kolyshkin <kir@openvz.org>
Reviewed-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>