message: Add fragment identifier to build readme
diff: @@ -122,7 +122,7 @@ mergeStream(project.sources(), project.dependencies())
  .pipe(gulp.dest('build/'));
  ```
  -The bundler() method accepts an options object to configure bundling. See [Using polymer-bundler programmatically](https://github.com/Polymer/tools/tree/master/packages/bundler) for a detailed list of accepted options.
  +The bundler() method accepts an options object to configure bundling. See [Using polymer-bundler programmatically](https://github.com/Polymer/tools/tree/master/packages/bundler#using-polymer-bundler-programmatically) for a detailed list of accepted options.
  ```js
  const {generateCountingSharedBundleUrlMapper,
  