Function af_cdouble stdev

src/api/cpp/stdev.cpp:38–42

template<>
AFAPI af_cdouble stdev(const array& in, const af_var_bias bias) {
    double real, imag;
    AF_THROW(af_stdev_all_v2(&real, &imag, in.get(), bias));
    return {real, imag};
}

template<>
AFAPI af_cfloat stdev(const array& in) {