Fix Window-GPU build

Fix Window-GPU build

7631a13fc278 broke the Windows build.
Cmake bug 8189 makes it impossible to set include
directories properly per file.
This temporary solution uses two solutions for
Windows / non-Windows. The non-Windows solution
uses COMPILE_FLAGS but doesn't work on Windows,
some IDE and potentially other compilers.
The Windows solution adds the include directory
for all source files, even those which don't
require CUDA.

This should be replace with a proper solution.

Change-Id: I3c581f2c34ea8c7af60b8c82aac52ac2ab9cf981