This patch makes it possible to use gnu-win32 and lcc-win32
(http://www.cs.virginia.edu/~lcc-win32/) compilers to build
extension modules. It adds compiler specific sections to
PC/config.h .
It also extends the Borland compiler section. This has then two parts,
one for Win32 and the other one for the rest. The Win32 part
should be almost complete.

*** This patch is not intended to make it possible to compile
     Python with these compilers, it is intended to be able to
     use these compilers to build extension modules. ****