criação de patch para habilitar iframe do output das views

[thiagogomesverissimo]

No arquivo core/lib/Drupal/Component/Utility/Xss.php adicionar 'iframe' no array $adminTags

https://drupal.stackexchange.com/questions/217351/iframe-in-rewrite-results-override-the-output-of-this-field-with-custom-text