bug#26091: Add pkg-config file for libidn2

[Ludovic Courtès]

Marius Bakke <address@hidden> skribis:

> Ludovic Courtès <address@hidden> writes:

[...]

>> If upstream libidn2 does not install libidn2.pc, then I’m rather against
>> adding it.  It’s a decision for upstream to make.

[...]

> Apparently upstream added a "libidn2.pc" recently, so this would only be
> a temporary workaround until 0.17 is released:
>
> https://gitlab.com/jas/libidn2/commit/84b396c528dfed9ea6e8248f0522d120c9bd6186

Oh perfect, that addresses my concern.  In that case, let’s just do what
you suggested in the first place or apply this patch.  Make sure to
leave a comment stating that upstream will be providing the .pc file
afterwards.

Thanks!

Ludo’.