[v2] CUDA version uses fast math, SYCL does not

At least the v2 version of miniBUDE (have not looked at the other one) uses `--use_fast_math` with CUDA, while not using `-ffast-math` with SYCL. This causes results to not be comparable between the two. Fast math significantly impacts performance for this app. Note that this does not impact `icpx` which uses `-ffast-math` by default.