CMake: Tests now include the correct FFT headers, - previously only the kissFFT headers were included, even if cufft or FFTW were used.
CMake: Tests now include the correct FFT headers,
- previously only the kissFFT headers were included, even if cufft or FFTW were used.

spirit-code/spirit,spirit-code/spirit,spirit-code/spirit,spirit-code/spirit,spirit-code/spirit,spirit-code/spirit