[BUG] Incorrect include of libdxg

[lars18th]

Hi,

The current implementation fails to compile because an incorrect include. So this line:

libdxgtest/src/main.cpp

Line 20 in fb7a095

#include <dxg/d3dkmthk.h>

requires to be #include <d3dkmthk.h> as the subdirectory dxg doesn't exists in the includes of libdxg project:
https://github.com/microsoft/libdxg/tree/main/include

I hope you want to fix this.
Regards.