[poppler] fix .pc files

[Albert Astals Cid]

El dilluns, 6 de novembre de 2017, a les 13:01:31 CET, David Tardon va 
escriure:
> Hello all,
> 
> pc files in 0.61 are broken: the libdir and includedir contain just the
> last component of the path (include, lib/lib64). In addition, libdir in
> poppler-qt5.pc is not expanded because of missing @. Patches attached.
> 
> D.

https://cgit.freedesktop.org/poppler/poppler/commit/?
id=c45efa2d7e0db8a4ace0e8c6955b3fa48dc6d070
seems to be the same fix, right?

Cheers,
  Albert