Not all ARM machines sections Cc the qemu-arm@nongnu.org list,
fix this.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20200120185928.25115-2-philmd@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>