fix(@angular-devkit/build-angular): when optimizing do not emit Ivy class metadata or module scope

Author: clydin

packages/angular_devkit/build_angular/src/angular-cli-files/models/webpack-configs/typescript.ts

@@ -122,10 +122,17 @@ export function getAotConfig(wco: WebpackConfigOptions, i18nExtract = false) {
   }
 
   const test = /(?:\.ngfactory\.js|\.ngstyle\.js|\.tsx?)$/;
+  const optimize = wco.buildOptions.optimization.scripts;
 
   return {
     module: { rules: [{ test, use: loaders }] },
-    plugins: [_createAotPlugin(wco, { tsConfigPath }, i18nExtract)]
+    plugins: [
+      _createAotPlugin(
+        wco,
+        { tsConfigPath, emitClassMetadata: !optimize, emitNgModuleScope: !optimize },
+        i18nExtract,
+      ),
+    ],
   };
 }