bug#7562: automake-set variables don't get properly reordered when overriden in Makefile.am

[Ralf Wildenhues]

Hello,

* Stefano Lattarini wrote on Sun, Dec 05, 2010 at 09:50:52PM CET:
> On Sunday 05 December 2010, Jack Kelly wrote:
> > make prefix=$HOME/stow/foo-x.y.z

> > So whatever you do with the variable ordering, I hope it doesn't break
> > overrides from the command line.
> > 
> Oh, it must absolutely not break that, since the behaviour you want is
> mandated by the GNU coding standards, and cannot be changed.  Breaking
> it would be a *grave* automake bug.  So I guess you're safe in this
> respect.

Of course, the GNU Coding Standards are a bit oblivious of existing
limitations of non-GNU make implementations at this point; see
  info Autoconf "Macros and Submakes"

Oh well.  Another issue completely unrelated to this PR ...  ;-)

Cheers,
Ralf