only add golang.org vendor

vendor/github.com/siddontang/ledisdb/store/rocksdb/slice.go

@@ -1,41 +0,0 @@
-//+build rocksdb
-
-package rocksdb
-
-// #cgo LDFLAGS: -lrocksdb
-// #include <rocksdb/c.h>
-// #include <stdlib.h>
-import "C"
-
-import (
-	"reflect"
-	"unsafe"
-)
-
-type CSlice struct {
-	data unsafe.Pointer
-	size int
-}
-
-func NewCSlice(p unsafe.Pointer, n int) *CSlice {
-	return &CSlice{p, n}
-}
-
-func (s *CSlice) Data() []byte {
-	var value []byte
-
-	sH := (*reflect.SliceHeader)(unsafe.Pointer(&value))
-	sH.Cap = int(s.size)
-	sH.Len = int(s.size)
-	sH.Data = uintptr(s.data)
-
-	return value
-}
-
-func (s *CSlice) Size() int {
-	return int(s.size)
-}
-
-func (s *CSlice) Free() {
-	C.free(s.data)
-}