/usr/share/php/Symfony/ is in php-symfony-config 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/Config/
/usr/share/php/Symfony/Component/Config/ConfigCache.php
/usr/share/php/Symfony/Component/Config/Definition/
/usr/share/php/Symfony/Component/Config/Definition/ArrayNode.php
/usr/share/php/Symfony/Component/Config/Definition/BaseNode.php
/usr/share/php/Symfony/Component/Config/Definition/BooleanNode.php
/usr/share/php/Symfony/Component/Config/Definition/Builder/
/usr/share/php/Symfony/Component/Config/Definition/Builder/ArrayNodeDefinition.php
/usr/share/php/Symfony/Component/Config/Definition/Builder/BooleanNodeDefinition.php
/usr/share/php/Symfony/Component/Config/Definition/Builder/EnumNodeDefinition.php
/usr/share/php/Symfony/Component/Config/Definition/Builder/ExprBuilder.php
/usr/share/php/Symfony/Component/Config/Definition/Builder/FloatNodeDefinition.php
/usr/share/php/Symfony/Component/Config/Definition/Builder/IntegerNodeDefinition.php
/usr/share/php/Symfony/Component/Config/Definition/Builder/MergeBuilder.php
/usr/share/php/Symfony/Component/Config/Definition/Builder/NodeBuilder.php
/usr/share/php/Symfony/Component/Config/Definition/Builder/NodeDefinition.php
/usr/share/php/Symfony/Component/Config/Definition/Builder/NodeParentInterface.php
/usr/share/php/Symfony/Component/Config/Definition/Builder/NormalizationBuilder.php
/usr/share/php/Symfony/Component/Config/Definition/Builder/NumericNodeDefinition.php
/usr/share/php/Symfony/Component/Config/Definition/Builder/ParentNodeDefinitionInterface.php
/usr/share/php/Symfony/Component/Config/Definition/Builder/ScalarNodeDefinition.php
/usr/share/php/Symfony/Component/Config/Definition/Builder/TreeBuilder.php
/usr/share/php/Symfony/Component/Config/Definition/Builder/ValidationBuilder.php
/usr/share/php/Symfony/Component/Config/Definition/Builder/VariableNodeDefinition.php
/usr/share/php/Symfony/Component/Config/Definition/ConfigurationInterface.php
/usr/share/php/Symfony/Component/Config/Definition/EnumNode.php
/usr/share/php/Symfony/Component/Config/Definition/Exception/
/usr/share/php/Symfony/Component/Config/Definition/Exception/DuplicateKeyException.php
/usr/share/php/Symfony/Component/Config/Definition/Exception/Exception.php
/usr/share/php/Symfony/Component/Config/Definition/Exception/ForbiddenOverwriteException.php
/usr/share/php/Symfony/Component/Config/Definition/Exception/InvalidConfigurationException.php
/usr/share/php/Symfony/Component/Config/Definition/Exception/InvalidDefinitionException.php
/usr/share/php/Symfony/Component/Config/Definition/Exception/InvalidTypeException.php
/usr/share/php/Symfony/Component/Config/Definition/Exception/UnsetKeyException.php
/usr/share/php/Symfony/Component/Config/Definition/FloatNode.php
/usr/share/php/Symfony/Component/Config/Definition/IntegerNode.php
/usr/share/php/Symfony/Component/Config/Definition/NodeInterface.php
/usr/share/php/Symfony/Component/Config/Definition/NumericNode.php
/usr/share/php/Symfony/Component/Config/Definition/Processor.php
/usr/share/php/Symfony/Component/Config/Definition/PrototypeNodeInterface.php
/usr/share/php/Symfony/Component/Config/Definition/PrototypedArrayNode.php
/usr/share/php/Symfony/Component/Config/Definition/ReferenceDumper.php
/usr/share/php/Symfony/Component/Config/Definition/ScalarNode.php
/usr/share/php/Symfony/Component/Config/Definition/VariableNode.php
/usr/share/php/Symfony/Component/Config/Exception/
/usr/share/php/Symfony/Component/Config/Exception/FileLoaderImportCircularReferenceException.php
/usr/share/php/Symfony/Component/Config/Exception/FileLoaderLoadException.php
/usr/share/php/Symfony/Component/Config/FileLocator.php
/usr/share/php/Symfony/Component/Config/FileLocatorInterface.php
/usr/share/php/Symfony/Component/Config/Loader/
/usr/share/php/Symfony/Component/Config/Loader/DelegatingLoader.php
/usr/share/php/Symfony/Component/Config/Loader/FileLoader.php
/usr/share/php/Symfony/Component/Config/Loader/Loader.php
/usr/share/php/Symfony/Component/Config/Loader/LoaderInterface.php
/usr/share/php/Symfony/Component/Config/Loader/LoaderResolver.php
/usr/share/php/Symfony/Component/Config/Loader/LoaderResolverInterface.php
/usr/share/php/Symfony/Component/Config/Resource/
/usr/share/php/Symfony/Component/Config/Resource/DirectoryResource.php
/usr/share/php/Symfony/Component/Config/Resource/FileResource.php
/usr/share/php/Symfony/Component/Config/Resource/ResourceInterface.php
/usr/share/php/Symfony/Component/Config/Util/
/usr/share/php/Symfony/Component/Config/Util/XmlUtils.php