compel: plugins,std -- Add syscall-types.h header

Both std and criu will use it for syscalls sake.
Note I've to disable x86 compat mode for a while:
we have to provide native types there thus will
back once everything else is complete.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>