/usr/share/php/Symfony/ is in php-symfony-options-resolver 2.3.21+dfsg-4+deb8u3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/Symfony/Component/
/usr/share/php/Symfony/Component/OptionsResolver/
/usr/share/php/Symfony/Component/OptionsResolver/Exception/
/usr/share/php/Symfony/Component/OptionsResolver/Exception/ExceptionInterface.php
/usr/share/php/Symfony/Component/OptionsResolver/Exception/InvalidOptionsException.php
/usr/share/php/Symfony/Component/OptionsResolver/Exception/MissingOptionsException.php
/usr/share/php/Symfony/Component/OptionsResolver/Exception/OptionDefinitionException.php
/usr/share/php/Symfony/Component/OptionsResolver/Options.php
/usr/share/php/Symfony/Component/OptionsResolver/OptionsResolver.php
/usr/share/php/Symfony/Component/OptionsResolver/OptionsResolverInterface.php