[CMake] WinCE Support

[Andreas Pokorny]

Hi,
I just got a task to create a patched version of cmake with CE SDK
support for Visual Studio (for internal evaluation), and to do
whatever is necessary to get the patch into shape for inclusion to
cmake.

@Clemens: I just took http://cmake.org/Bug/view.php?id=8102  and
http://cmake.org/Bug/view.php?id=7919

Configuring our project fails during the CMakeTestCCompiler.cmake
tests, because it tries to execute the generated project files with
VCExpress wich has no SDK configured - and I doubt that it supports
multiple SDKs at all. I am investigating that right now.

kind regards
Andreas Pokorny