type sort.xorshift

4 uses

	sort (current package)
		sort.go#L66: type xorshift uint64
		sort.go#L68: func (r *xorshift) Next() uint64 {
		zsortfunc.go#L243: 		random := xorshift(length)
		zsortinterface.go#L243: 		random := xorshift(length)