feat(@angular/cli): add scope hoisting

See the following links for details on scope hoisting:
https://medium.com/webpack/webpack-freelancing-log-book-week-5-7-4764be3266f5
https://medium.com/webpack/webpack-freelancing-log-book-week-8-e73811deb412

Node's global and process were also removed, since they seemed to affect
optimization gains.

Author: filipesilva

package.json

@@ -94,7 +94,7 @@
     "typescript": "~2.3.1",
     "url-loader": "^0.5.7",
     "walk-sync": "^0.3.1",
-    "webpack": "~2.4.0",
+    "webpack": "webpack/webpack#next",
     "webpack-dev-middleware": "^1.10.2",
     "webpack-dev-server": "~2.4.5",
     "webpack-merge": "^2.4.0",

packages/@angular/cli/models/webpack-configs/common.ts

@@ -97,11 +97,11 @@ export function getCommonConfig(wco: WebpackConfigOptions) {
     ].concat(extraPlugins),
     node: {
       fs: 'empty',
-      global: true,
+      global: 'empty',
       crypto: 'empty',
       tls: 'empty',
       net: 'empty',
-      process: true,
+      process: false,
       module: false,
       clearImmediate: false,
       setImmediate: false

packages/@angular/cli/models/webpack-configs/production.ts

@@ -86,6 +86,7 @@ export const getProdConfig = function (wco: WebpackConfigOptions) {
         'NODE_ENV': 'production'
       }),
       new (<any>webpack).HashedModuleIdsPlugin(),
+      new webpack.optimize.ModuleConcatenationPlugin(),
       new webpack.optimize.UglifyJsPlugin(<any>{
         mangle: { screw_ie8: true },
         compress: { screw_ie8: true, warnings: buildOptions.verbose },

packages/@angular/cli/package.json

@@ -79,7 +79,7 @@
     "typescript": ">=2.0.0 <2.4.0",
     "url-loader": "^0.5.7",
     "walk-sync": "^0.3.1",
-    "webpack": "~2.4.0",
+    "webpack": "webpack/webpack#next",
     "webpack-dev-middleware": "^1.10.2",
     "webpack-dev-server": "~2.4.5",
     "webpack-merge": "^2.4.0",