Fix qemu build on NetBSD/evbarm-aarch64 by providing a NetBSD specific
cpu_signal_handler.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Nick Hudson <skrll@netbsd.org>
Message-Id: <20200517101529.5367-1-skrll@netbsd.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>