Fixed the import statement so webpack doesnt show an error

Author: hansl

addon/ng2/models/webpack-build-common.ts

@@ -45,8 +45,8 @@ export function getWebpackCommonConfig(projectRoot: string, sourceDir: string) {
           test: /(systemjs_component_resolver|system_js_ng_module_factory_loader)\.js$/,
           loader: 'string-replace-loader',
           query: {
-            search: '(lang_1(.*[\\n\\r]+\\s*\\.|\\.))?(global(.*[\\n\\r]+\\s*\\.|\\.))?(System|SystemJS)(.*[\\n\\r]+\\s*\\.|\\.)import',
-            replace: 'System.import',
+            search: '(lang_1(.*[\\n\\r]+\\s*\\.|\\.))?(global(.*[\\n\\r]+\\s*\\.|\\.))?(System|SystemJS)(.*[\\n\\r]+\\s*\\.|\\.)import\\(',
+            replace: 'System.import("" + ',
             flags: 'g'
           }
         },