[Tracking] Webpack 4

[sis0k0]

• Webpack recompile fails when using AoT with watch mode.
• Implement platform matching virtualFs host and provide it to the AngularCompilerPlugin. Example: https://github.com/sis0k0/web-mobile-project/blob/master/webpack.config.js#L256
• Document the changes.
• Update verify-ns-build and CLI tests with the new chunks names and sizes.
• Add the Angular compiler to the vendor chunk when building in JiT mode Add @angular/compiler to vendor chunk when building in JiT mode #498
• Require modules dynamically when generating snapshot Require modules dynamically when generating snapshot #511
• Enable compress option for Android.
• Target esm modules when building with webpack.
• Make the uglify flag also enable production mode.

[sis0k0]

Released with 0.12.0.