syr: Symmetric rank 1 update

Functions
void	blas::internal::syr (char uplo, blas_int n, float alpha, float const *x, blas_int incx, float *A, blas_int lda)
	Low-level overload wrapper calls Fortran, float version.
void	blas::internal::syr (char uplo, blas_int n, double alpha, double const *x, blas_int incx, double *A, blas_int lda)
	Low-level overload wrapper calls Fortran, double version.
template<typename scalar_t >
void	blas::impl::syr (blas::Layout layout, blas::Uplo uplo, int64_t n, scalar_t alpha, scalar_t const *x, int64_t incx, scalar_t *A, int64_t lda)
	Mid-level templated wrapper checks and converts arguments, then calls low-level wrapper.

Detailed Description