fix CameraSnapshot tmp save addr,use relative addr

liuxiaolong

2019-07-11 f5bd3c09e7d38754e58d7d4c5a1260c22cdba29d

 controllers/cameraPolygon.go

@@ -116,7 +116,7 @@
   if flag {
      util.ResponseFormat(c,code.Success,data)
   } else {
      util.ResponseFormat(c,code.ComError,data)
      util.ResponseFormat(c,code.ComError,"更新失败")
   }
}