Log calls to pkg-config

[Tollef Fog Heen]

* "Julio M. Merino Vidal" 

| Do you like the idea?  Do you think it'd be integrated into
| pkg-config (thus simplifying our package maintenance)?  If so,
| I'll provide another patch to also update the documentation
| wherever appropriate.  If not... well, we'll keep it in our tree ;)

Nice, small and shiny.  Applied.

-- 
Tollef Fog Heen
UNIX is user friendly, it's just picky about who its friends are