babel-loader should exclude node_modules on testing iview*.js

[0xffff00]

webpack.base.config.js中与iview*.js对应的babel-loader规则也许应该加上： exclude: /node_modules/

            {
                test: /iview\/.*?js$/,
                loader: 'babel-loader' 
                exclude: /node_modules/  <------少了这一行，this line should be added
            },
            {
                test: /\.js$/,
                loader: 'babel-loader',
                exclude: /node_modules/
            },

不加的话，执行webpack时，windows下没问题，在linux上会报[BABEL] Note: The code generator has deoptimised the styling of "..." as it exceeds the max of "500KB". 最终编译出来的静态文件会报错
具体请参见：

• ([tally] throw warning: "export 'default' (imported as 'iView') was not found in 'iview' when npm building, cause fatal error actually  0xffff00/skfe#20 (comment))
• (a weird lodash warning emitted by babel babel/babel#6041 (comment))