#135 Build fails on Mac OS X 10.4

[Mitch Chapman]

Compilation of PyOpenGL-2.0.1.09 on Mac OS X 10.4.1, for a
framework build of Python 2.4.1, fails. It seems to be finding the
wrong version of sys/stat.h. Instead of using /usr/include/sys/stat.h
the compiler tries to include /System/Library/Frameworks/
Kernel.framework/Headers/sys/stat.h.

One workaround is to remove /System/Library/Frameworks/
Kernel.framework/Headers from the list of include directories in
config/darwin.cfg. (See context diff, attached.)