sysemu/xen: Forbid using Xen headers in user emulation

Xen is a system specific accelerator, it makes no sense
to include its headers in user emulation.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: David Woodhouse <dwmw@amazon.co.uk>
Message-Id: <20231114143816.71079-3-philmd@linaro.org>
1 file changed