Function reorder

src/api/cpp/data.cpp:259–264

}

array reorder(const array &in, const unsigned x, const unsigned y,
              const unsigned z, const unsigned w) {
    af_array out = 0;
    AF_THROW(af_reorder(&out, in.get(), x, y, z, w));
    return array(out);
}

array shift(const array &in, const int x, const int y, const int z,
            const int w) {