[ada, build] Restore Solaris/amd64 Ada bootstrap (PR ada/57188)

[Rainer Orth]

Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE> writes:

> As described in the PR, amd64-pc-solaris2.1[01] Ada bootstrap was failing
> for some time.  It has turned out that this patch is the culprit:
>
> 2013-04-23  Eric Botcazou  <ebotcazou@adacore.com>
>             Pascal Obry    <obry@adacore.com>
>
>         * gcc-interface/Makefile.in (targ): Fix target name check.
[...]
> I couldn't find the gcc-patches posting for this patch, thus I'm missing
> the rationale for it.  It seems rather counterintuitive and fragile to
> me, replacing the canonical $target by the far more varied $target_alias.
>
> If there's really a good reason to keep that patch nonetheless, the
> following patch fixes Solaris/x64 bootstrap.
>
> Bootstrapped without regression on amd64-pc-solaris2.10 and
> i386-pc-solaris2.11.  Ok for mainline?

The patch was approved by Arno in the PR, so I've installed it.

	Rainer

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Rainer Orth, Center for Biotechnology, Bielefeld University