/usr/share/php/Symfony/ is in php-symfony-twig-bridge 2.3.21+dfsg-4+deb8u3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/Symfony/Bridge/
/usr/share/php/Symfony/Bridge/Twig/
/usr/share/php/Symfony/Bridge/Twig/Extension/
/usr/share/php/Symfony/Bridge/Twig/Extension/CodeExtension.php
/usr/share/php/Symfony/Bridge/Twig/Extension/FormExtension.php
/usr/share/php/Symfony/Bridge/Twig/Extension/HttpKernelExtension.php
/usr/share/php/Symfony/Bridge/Twig/Extension/RoutingExtension.php
/usr/share/php/Symfony/Bridge/Twig/Extension/SecurityExtension.php
/usr/share/php/Symfony/Bridge/Twig/Extension/TranslationExtension.php
/usr/share/php/Symfony/Bridge/Twig/Extension/YamlExtension.php
/usr/share/php/Symfony/Bridge/Twig/Form/
/usr/share/php/Symfony/Bridge/Twig/Form/TwigRenderer.php
/usr/share/php/Symfony/Bridge/Twig/Form/TwigRendererEngine.php
/usr/share/php/Symfony/Bridge/Twig/Form/TwigRendererEngineInterface.php
/usr/share/php/Symfony/Bridge/Twig/Form/TwigRendererInterface.php
/usr/share/php/Symfony/Bridge/Twig/Node/
/usr/share/php/Symfony/Bridge/Twig/Node/FormEnctypeNode.php
/usr/share/php/Symfony/Bridge/Twig/Node/FormThemeNode.php
/usr/share/php/Symfony/Bridge/Twig/Node/RenderBlockNode.php
/usr/share/php/Symfony/Bridge/Twig/Node/SearchAndRenderBlockNode.php
/usr/share/php/Symfony/Bridge/Twig/Node/TransDefaultDomainNode.php
/usr/share/php/Symfony/Bridge/Twig/Node/TransNode.php
/usr/share/php/Symfony/Bridge/Twig/NodeVisitor/
/usr/share/php/Symfony/Bridge/Twig/NodeVisitor/Scope.php
/usr/share/php/Symfony/Bridge/Twig/NodeVisitor/TranslationDefaultDomainNodeVisitor.php
/usr/share/php/Symfony/Bridge/Twig/NodeVisitor/TranslationNodeVisitor.php
/usr/share/php/Symfony/Bridge/Twig/Resources/
/usr/share/php/Symfony/Bridge/Twig/Resources/views/
/usr/share/php/Symfony/Bridge/Twig/Resources/views/Form/
/usr/share/php/Symfony/Bridge/Twig/Resources/views/Form/form_div_layout.html.twig
/usr/share/php/Symfony/Bridge/Twig/Resources/views/Form/form_table_layout.html.twig
/usr/share/php/Symfony/Bridge/Twig/TokenParser/
/usr/share/php/Symfony/Bridge/Twig/TokenParser/FormThemeTokenParser.php
/usr/share/php/Symfony/Bridge/Twig/TokenParser/TransChoiceTokenParser.php
/usr/share/php/Symfony/Bridge/Twig/TokenParser/TransDefaultDomainTokenParser.php
/usr/share/php/Symfony/Bridge/Twig/TokenParser/TransTokenParser.php
/usr/share/php/Symfony/Bridge/Twig/Translation/
/usr/share/php/Symfony/Bridge/Twig/Translation/TwigExtractor.php
/usr/share/php/Symfony/Bridge/Twig/TwigEngine.php