function srotg( a, b ) {
	var out = new Float32Array( 4 );
	return fcn( a, b, out, 1, 0 );
}
Constructs a Givens plane rotation.

@param {number} a - rotational elimination parameter
@param {number} b - rotational elimination parameter
@returns {Float32Array} output array

@example
var out = srotg( 0.0, 2.0 );
// returns <Float32Array>[ 2.0, 1.0, 0.0, 1.0 ]