[poppler] Add FontInfo::getType()

[Martin Kretzschmar]

Albert Astals Cid schrieb:
> This patch adds a function that returns which type the font is, we need it if 
> we ever want to use that for kpdf as we give that info in kpdf.
> 

My patch (from ten days ago) just exports the GfxFontType value. But I
think I can live with the GooStrings (i.e. in theory strings are worse
for translation, in practice, I can't imagine that there are
translations for these strings).

Martin