VecCore-0.8.1-bp160.1.9

- Pass CMAKE_CXX_STANDARD=14 to cmake to allow building tests
  against gtest >= 1.14.0.

- update to 0.8.1:
  * Mark all `Mask{Empty,Full}` as `VECCORE_ATT_HOST_DEVICE`
  * Avoid including SIMD headers when compiling with nvcc

- Update to version 0.8.0:
  * New backend based on GCC 11's implementation of
    std::experimental::simd, which is part of the experimental
    support for data parallel types in C++20.
  * This backend offers the best of both Vc and UME::SIMD,
    as it performs well in most cases, from SSE2 up to AVX512.
- Drop upstream fixed VecCore-support-external-ctest.patch

- Initial package.
- Add VecCore-support-external-ctest.patch: Support using external
  gtest instead of building it in-source; patch sent upstream.