fix(xxhash3): fix data race

[HuangHongkai]

xxhash单测出现开启-race出现报错，case

func TestConcurrent(t *testing.T) {
	var dataList = [][]byte{
		make([]byte, 1000),
		make([]byte, 1000),
		make([]byte, 1000),
	}
	var wg = sync.WaitGroup{}
	for _, data := range dataList {
		wg.Add(1)
		data := data
		go func() {
			// xxh3HashLarge
			Hash(data)
			wg.Done()
		}()
	}
	wg.Wait()
}

报错信息

=== RUN   TestConcurrent
==================
WARNING: DATA RACE
Write at 0x000001389480 by goroutine 21:
  github.com/bytedance/gopkg/util/xxhash3.xxh3HashLarge()
      /Users/huanghongkai/go/src/bytedance/gopkg/util/xxhash3/hash.go:120 +0x2ef9
  github.com/bytedance/gopkg/util/xxhash3.Hash()
      /Users/huanghongkai/go/src/bytedance/gopkg/util/xxhash3/hash.go:33 +0xc9
  github.com/bytedance/gopkg/util/xxhash3.TestConcurrent.func1()
      /Users/huanghongkai/go/src/bytedance/gopkg/util/xxhash3/util_test.go:21 +0x4c

Previous write at 0x000001389480 by goroutine 20:
  github.com/bytedance/gopkg/util/xxhash3.xxh3HashLarge()
      /Users/huanghongkai/go/src/bytedance/gopkg/util/xxhash3/hash.go:120 +0x2ef9
  github.com/bytedance/gopkg/util/xxhash3.Hash()
      /Users/huanghongkai/go/src/bytedance/gopkg/util/xxhash3/hash.go:33 +0xc9
  github.com/bytedance/gopkg/util/xxhash3.TestConcurrent.func1()
      /Users/huanghongkai/go/src/bytedance/gopkg/util/xxhash3/util_test.go:21 +0x4c

Goroutine 21 (running) created at:
  github.com/bytedance/gopkg/util/xxhash3.TestConcurrent()
      /Users/huanghongkai/go/src/bytedance/gopkg/util/xxhash3/util_test.go:19 +0x23a
  testing.tRunner()
      /usr/local/go/src/testing/testing.go:1193 +0x202

Goroutine 20 (finished) created at:
  github.com/bytedance/gopkg/util/xxhash3.TestConcurrent()
      /Users/huanghongkai/go/src/bytedance/gopkg/util/xxhash3/util_test.go:19 +0x23a
  testing.tRunner()
      /usr/local/go/src/testing/testing.go:1193 +0x202
==================
    testing.go:1092: race detected during execution of test
--- FAIL: TestConcurrent (0.00s)
=== CONT  
    testing.go:1092: race detected during execution of test
FAIL
exit status 1
FAIL    github.com/bytedance/gopkg/util/xxhash3 12.903s

[zhangyunhao116]

Thanks!