implement Env::NewRandomAccessFile()
implement Env::NewRandomAccessFile()

zao/kkowalczyk-leveldb,LazyCodingCat/LevelDB,zao/kkowalczyk-leveldb,zao/kkowalczyk-leveldb,LazyCodingCat/LevelDB,LazyCodingCat/LevelDB,zao/kkowalczyk-leveldb,LazyCodingCat/LevelDB