Please include ada-hurd.diff upstream (try2)

[Arnaud Charlet]

> Yes, you are right, somehow I submitted the old patch. Attached is the
> updated one, with a proposed ChangeLog entry included.

The copyright notices are wrong (or at least incomplete).

Arno
> 
> Thanks!

> 2016-03-16  Svante Signell  <svante.signell@gmail.com>
> 
>         * gcc-interface/Makefile.in: Add support for x86 GNU/Hurd.
>         * s-osinte-gnu.ads: New specification file.
>         * s-osinte-gnu.adb: New body file, basically
>         s-osinte-posix.adb
>           adding dummy implementation of functions not yet implemented.