[Fontconfig] CMakeLists.txt for fontconfig library (enables native compilation on windows)

[Pavel Koshevoy]

Hi,

I've needed to debug a strange crash in fontconfig-2.10.1 library in my 
video player on winxp.   The mingw build of fontconfig was not working 
right, so I ended up making a cmake project for fontconfig (just the 
library, not any of the executables).  I've used this to generate a 
MSVS2005 solution and build fontconfig natively.  I've also added a very 
thin portability layer to compensate for lack of dirent.h (and a couple 
other minor things) on windows.  If anyone is interested I can 
contribute a patch (I'll have to clean it up a little first).

     Pavel.