const compress/flate.prime4bytes

3 uses

	compress/flate (current package)
		deflate.go#L337: 	return (u * prime4bytes) >> (32 - h)
		deflatefast.go#L150: 	prime4bytes = 2654435761
		deflatefast.go#L174: 		return (uint32(u) * prime4bytes) >> (32 - b)