[WEEX-523][iOS] Update for fix WXConvert UIColor related crash
[WEEX-523][iOS] Update for fix WXConvert UIColor related crash

KalicyZhou/incubator-weex,KalicyZhou/incubator-weex,Hanks10100/incubator-weex,KalicyZhou/incubator-weex,alibaba/weex,Hanks10100/incubator-weex,acton393/incubator-weex,miomin/incubator-weex,miomin/incubator-weex,acton393/incubator-weex,miomin/incubator-weex,acton393/incubator-weex,Hanks10100/incubator-weex,acton393/incubator-weex,acton393/incubator-weex,alibaba/weex,alibaba/weex,miomin/incubator-weex,KalicyZhou/incubator-weex,acton393/incubator-weex,acton393/incubator-weex,Hanks10100/incubator-weex,Hanks10100/incubator-weex,miomin/incubator-weex,Hanks10100/incubator-weex,acton393/incubator-weex,KalicyZhou/incubator-weex,miomin/incubator-weex,KalicyZhou/incubator-weex,alibaba/weex,miomin/incubator-weex,alibaba/weex,Hanks10100/incubator-weex,alibaba/weex,miomin/incubator-weex,alibaba/weex,Hanks10100/incubator-weex