Based on top of #234. This pull request makes the icpx test with SYCL.
I also added --output-on-failure to CTest and needed to allow CL/sycl.hpp instead of sycl/sycl.hpp for older oneAPI releases. The header checks needs C++17 but SYCL needs C++17 support anyway.
Based on top of #234. This pull request makes the
icpxtest withSYCL. I also added--output-on-failuretoCTestand needed to allowCL/sycl.hppinstead ofsycl/sycl.hppfor olderoneAPIreleases. The header checks needsC++17butSYCLneeds C++17 support anyway.