经典哈希函数-ghash

常用经典哈希函数Go语言实现，提供uint32及uint64类型的哈希函数。

使用方式 ：

import "github.com/gogf/gf/v2/encoding/ghash"

接口文档 ：

https://pkg.go.dev/github.com/gogf/gf/v2/encoding/ghash

基准测试：

goos: darwin
goarch: amd64
pkg: github.com/gogf/gf/v2/encoding/ghash
cpu: Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
Benchmark_BKDR
Benchmark_BKDR-12          39315165            26.88 ns/op
Benchmark_BKDR64
Benchmark_BKDR64-12        62891215            22.61 ns/op
Benchmark_SDBM
Benchmark_SDBM-12          49689925            25.40 ns/op
Benchmark_SDBM64
Benchmark_SDBM64-12        48860472            24.38 ns/op
Benchmark_RS
Benchmark_RS-12            39463418            25.52 ns/op
Benchmark_SRS64
Benchmark_SRS64-12         53318370            19.45 ns/op
Benchmark_JS
Benchmark_JS-12            53751033            23.20 ns/op
Benchmark_JS64
Benchmark_JS64-12          62440287            19.25 ns/op
Benchmark_PJW
Benchmark_PJW-12           42439626            27.85 ns/op
Benchmark_PJW64
Benchmark_PJW64-12         37491696            33.28 ns/op
Benchmark_ELF
Benchmark_ELF-12           38034584            31.74 ns/op
Benchmark_ELF64
Benchmark_ELF64-12         44047201            27.58 ns/op
Benchmark_DJB
Benchmark_DJB-12           46994352            22.60 ns/op
Benchmark_DJB64
Benchmark_DJB64-12         61980186            19.19 ns/op
Benchmark_AP
Benchmark_AP-12            29544234            40.58 ns/op
Benchmark_AP64
Benchmark_AP64-12          28123783            42.48 ns/op