Function cblas::ssymv

pub unsafe fn ssymv(
    layout: Layout, 
    uplo: Part, 
    n: i32, 
    alpha: f32, 
    a: &[f32], 
    lda: i32, 
    x: &[f32], 
    incx: i32, 
    beta: f32, 
    y: &mut [f32], 
    incy: i32
)