* [ios] fix bug debugTool unload
* [ios] fix bug debugTool unload

alibaba/weex,KalicyZhou/incubator-weex,MrRaindrop/incubator-weex,kfeagle/weex,acton393/weex,xiayun200825/weex,weexteam/incubator-weex,Hanks10100/weex,boboning/weex,Hanks10100/incubator-weex,MrRaindrop/weex,weexteam/incubator-weex,leoward/incubator-weex,kfeagle/weex,cxfeng1/weex,erha19/incubator-weex,yuguitao/incubator-weex,kfeagle/weex,KalicyZhou/incubator-weex,LeeJay0226/weex,alibaba/weex,Hanks10100/weex,erha19/incubator-weex,KalicyZhou/incubator-weex,zhangquan/weex,Neeeo/incubator-weex,Hanks10100/weex,HomHomLin/weex,miomin/incubator-weex,bigconvience/weex,Hanks10100/incubator-weex,miomin/incubator-weex,Hanks10100/weex,miomin/incubator-weex,alibaba/weex,Hanks10100/weex,bigconvience/weex,alibaba/weex,cxfeng1/incubator-weex,leoward/incubator-weex,cxfeng1/incubator-weex,cxfeng1/weex,acton393/incubator-weex,MrRaindrop/incubator-weex,miomin/incubator-weex,acton393/incubator-weex,zhangquan/weex,Hanks10100/incubator-weex,HomHomLin/weex,KalicyZhou/incubator-weex,bigconvience/weex,MrRaindrop/weex,HomHomLin/weex,leoward/incubator-weex,erha19/incubator-weex,MrRaindrop/incubator-weex,dianwodaMobile/DWeex,weexteam/incubator-weex,acton393/weex,Hanks10100/incubator-weex,miomin/incubator-weex,acton393/incubator-weex,kfeagle/weex,acton393/incubator-weex,erha19/incubator-weex,acton393/weex,leoward/incubator-weex,acton393/weex,cxfeng1/weex,HomHomLin/weex,LeeJay0226/weex,alibaba/weex,boboning/weex,leoward/incubator-weex,Neeeo/incubator-weex,misakuo/incubator-weex,kfeagle/weex,xiayun200825/weex,MrRaindrop/weex,misakuo/incubator-weex,MrRaindrop/incubator-weex,Hanks10100/incubator-weex,yuguitao/incubator-weex,Neeeo/incubator-weex,cxfeng1/weex,LeeJay0226/weex,acton393/weex,MrRaindrop/weex,MrRaindrop/weex,zhangquan/weex,erha19/incubator-weex,erha19/incubator-weex,HomHomLin/weex,dianwodaMobile/DWeex,misakuo/incubator-weex,bigconvience/weex,bigconvience/weex,cxfeng1/incubator-weex,misakuo/incubator-weex,miomin/incubator-weex,boboning/weex,alibaba/weex,LeeJay0226/weex,HomHomLin/weex,cxfeng1/weex,erha19/incubator-weex,dianwodaMobile/DWeex,Hanks10100/incubator-weex,kfeagle/weex,acton393/incubator-weex,LeeJay0226/weex,LeeJay0226/weex,cxfeng1/incubator-weex,alibaba/weex,Hanks10100/incubator-weex,zhangquan/weex,yuguitao/incubator-weex,boboning/weex,boboning/weex,Hanks10100/incubator-weex,Neeeo/incubator-weex,cxfeng1/weex,yuguitao/incubator-weex,Neeeo/incubator-weex,miomin/incubator-weex,yuguitao/incubator-weex,Hanks10100/weex,boboning/weex,leoward/incubator-weex,misakuo/incubator-weex,acton393/incubator-weex,acton393/incubator-weex,weexteam/incubator-weex,weexteam/incubator-weex,zhangquan/weex,dianwodaMobile/DWeex,erha19/incubator-weex,acton393/incubator-weex,yuguitao/incubator-weex,acton393/weex,zhangquan/weex,KalicyZhou/incubator-weex,xiayun200825/weex,MrRaindrop/weex,MrRaindrop/incubator-weex,MrRaindrop/incubator-weex,bigconvience/weex,xiayun200825/weex,misakuo/incubator-weex,weexteam/incubator-weex,miomin/incubator-weex,xiayun200825/weex,Neeeo/incubator-weex,cxfeng1/incubator-weex,xiayun200825/weex,cxfeng1/incubator-weex,KalicyZhou/incubator-weex,dianwodaMobile/DWeex,dianwodaMobile/DWeex