Fix directory references in zlib build settings. Fixes http://pbrt.org/bugtracker/view.php?id=97.
Fix directory references in zlib build settings.
Fixes http://pbrt.org/bugtracker/view.php?id=97.

patwonder/pbrt-v2-skin,patwonder/pbrt-v2-skin,patwonder/pbrt-v2-skin,patwonder/pbrt-v2-skin,patwonder/pbrt-v2-skin