revert vuejs-templates#996 chunk names to minify prodution JS (vuejs-templates#1086)

Author: c0defre4k

template/build/webpack.prod.conf.js

@@ -26,7 +26,7 @@ const webpackConfig = merge(baseWebpackConfig, {
   output: {
     path: config.build.assetsRoot,
     filename: utils.assetsPath('js/[name].[chunkhash].js'),
-    chunkFilename: utils.assetsPath('js/[name].[chunkhash].js')
+    chunkFilename: utils.assetsPath('js/[id].[chunkhash].js')
   },
   plugins: [
     // http://vuejs.github.io/vue-loader/en/workflow/production.html