upgrade to latest donut with new flash-store with stable leveldb
upgrade to latest donut with new flash-store with stable leveldb

binsee/wechaty,zixia/wechaty,wechaty/wechaty,binsee/wechaty,wechaty/wechaty,mukaiu/wechaty,mukaiu/wechaty,binsee/wechaty,zixia/wechaty,mukaiu/wechaty,wechaty/wechaty