add upgrade size

liuxiaolong

2020-07-29 62175b6005328f0f1ad15cee75eda252df081743

 controllers/sys.go

@@ -43,6 +43,7 @@
            fmt.Println("unmarshal err:", e1)
            result.Msg = []string{}
         }
         result.Size = sv.Size

      } else {
         result.IsUpgrade = false