fix width calculate bug for grid in some device by flex
fix width calculate bug for grid in some device by flex

ddcat1115/ant-design-mobile,bccsafe/ant-design-mobile,ant-design/ant-design-mobile,ddcat1115/ant-design-mobile,bccsafe/ant-design-mobile,bccsafe/ant-design-mobile,ddcat1115/ant-design-mobile,ddcat1115/ant-design-mobile,bccsafe/ant-design-mobile,ddcat1115/ant-design-mobile,ant-design/ant-design-mobile,bccsafe/ant-design-mobile,ant-design/ant-design-mobile,ant-design/ant-design-mobile