Implement qemu_get_thread_id() for OpenBSD hosts, using
getthrid().
Signed-off-by: NDavid Carlier <devnexen@gmail.com>
Reviewed-by: NBrad Smith <brad@comstyle.com>
Message-id: CA+XhMqxD6gQDBaj8tX0CMEj3si7qYKsM8u1km47e_-U7MC37Pg@mail.gmail.com
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
[PMM: tidied up commit message]
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>