cmake HAVE_MEDIAFOUNDATION examples

webcamoid/webcamoid libAvKys/Plugins/VideoCapture/src/capture/mediafoundation/CMakeLists.txt :48

check_cxx_source_compiles("
#include <mfapi.h>
#include <mfidl.h>
#include <mfreadwrite.h>
#include <strmif.h>
#include <dbt.h>
#include <uuids.h>

int main()
{
    MFEnumDeviceSources(nullptr, nullptr, nullptr);

    return 0;
}" HAVE_MEDIAFOUNDATION)