Little test script to run the data given by testcase.tar.
Quick-fix for some warning during configuration.
One more attempt to offload the FFT via MKL's FFTW interface. Freeing the fftw_plan on the offload target fixes a previously present issue where the plan was free'd on the host but it was actually created on the coprocessor. Tagged the global variable fftw_plan with the target-attribute.