libpng: Don't create browse information files.
libpng: Don't create browse information files.

Turns out they are actually useless in Visual Studio 2010 and later (see
http://stackoverflow.com/questions/10229261/). Not creating them saves ~2
seconds of build time on my system.

VBChunguk/thcrap,thpatch/thcrap,thpatch/thcrap,thpatch/thcrap,thpatch/thcrap,VBChunguk/thcrap,VBChunguk/thcrap,thpatch/thcrap