Coordinating libffi upgrade

[Bill Nottingham]

Colin Walters (walters at verbum.org) said: 
> On Fri, 2012-11-02 at 16:04 -0400, Adam Jackson wrote:
> 
> > It looks like libffi is emitted into the minimal buildroot (rpm-build -> 
> > pkg-config -> glib2 -> libffi), so during the transition we'll need to 
> > build both sonames of libffi.  It might be worth keeping a compat-libffi 
> > around for a release or two anyway, the current soname has a _long_ history.
> 
> Or just apply the patch from here:
> http://lists.fedoraproject.org/pipermail/devel/2012-April/165871.html
> And skip tons of pain for all the libffi consumers at the tiny cost of a
> stub symbol.
> 
> Hm, no links to the patch in the archives.  Well, I'll attach it again,
> since I still have it sitting around in my libffi git checkout.

And note that whatever you do, F-19 is open for doing it now - you don't 
need to wait until F-18 ships...

Bill