[OE-core] [morty] backport request: nspr: set correct version in pkg-config file

[Max Krummenacher]

Hi

Can we backport the following commit to morty?
http://cgit.openembedded.org/openembedded-core/commit/?id=cb4f5ecf32006192baaf41218a3d7b43ca1c2951

It fixes pkgconfig to no longer report an old version.

Currently this breaks firefox in meta-browser morty branch.

Thanks
Max