Added previously-ignored Vue build files

Those globs will git you...

src/app/build/build.js

@@ -0,0 +1,35 @@
+require('./check-versions')()
+
+process.env.NODE_ENV = 'production'
+
+var ora = require('ora')
+var rm = require('rimraf')
+var path = require('path')
+var chalk = require('chalk')
+var webpack = require('webpack')
+var config = require('../config')
+var webpackConfig = require('./webpack.prod.conf')
+
+var spinner = ora('building for production...')
+spinner.start()
+
+rm(path.join(config.build.assetsRoot, config.build.assetsSubDirectory), err => {
+  if (err) throw err
+  webpack(webpackConfig, function (err, stats) {
+    spinner.stop()
+    if (err) throw err
+    process.stdout.write(stats.toString({
+      colors: true,
+      modules: false,
+      children: false,
+      chunks: false,
+      chunkModules: false
+    }) + '\n\n')
+
+    console.log(chalk.cyan('  Build complete.\n'))
+    console.log(chalk.yellow(
+      '  Tip: built files are meant to be served over an HTTP server.\n' +
+      '  Opening index.html over file:// won\'t work.\n'
+    ))
+  })
+})