[hurd,commited] hurd: fix gai_misc build

[Joseph Myers]

On Tue, 27 Feb 2018, Samuel Thibault wrote:

> diff --git a/sysdeps/mach/hurd/gai_misc.h b/sysdeps/mach/hurd/gai_misc.h
> new file mode 100644
> index 0000000000..7804139baa
> --- /dev/null
> +++ b/sysdeps/mach/hurd/gai_misc.h
> @@ -0,0 +1,67 @@
> +/* Copyright (C) 2006-2018 Free Software Foundation, Inc.

This is missing the descriptive comment at the start of the file, before 
the copyright notice.

-- 
Joseph S. Myers
joseph@codesourcery.com