Bug#824872: jessie-pu: package nspr/2:4.12-2+deb8u1

[Florian Weimer <fw@deneb.enyo.de>]

* Guido Günther:

> Note that the only (as to my understanding) serious regression has been
> pointed out by Florian as well:
>
>     https://lists.debian.org/debian-lts/2015/11/msg00037.html
>     https://bugzilla.redhat.com/show_bug.cgi?id=1260698
>
> and it's unclear if this part of the ABI.

The practical impact seems pretty low.

There is another ABI issue:

  https://bugzilla.mozilla.org/show_bug.cgi?id=1247021

But I think we are rebasing past the introduction of this struct and
its change, so it wouldn't impact Debian stable.