/usr/include/telepathy-qt5/TelepathyQt/_gen/ is in libtelepathy-qt5-dev 0.9.6.1-0ubuntu3.
This file is owned by root:root, with mode 0o755.
..
/usr/include/telepathy-qt5/TelepathyQt/_gen/cli-account-manager.h
/usr/include/telepathy-qt5/TelepathyQt/_gen/cli-account.h
/usr/include/telepathy-qt5/TelepathyQt/_gen/cli-call-content-media-description.h
/usr/include/telepathy-qt5/TelepathyQt/_gen/cli-call-content.h
/usr/include/telepathy-qt5/TelepathyQt/_gen/cli-call-stream-endpoint.h
/usr/include/telepathy-qt5/TelepathyQt/_gen/cli-call-stream.h
/usr/include/telepathy-qt5/TelepathyQt/_gen/cli-channel-dispatch-operation.h
/usr/include/telepathy-qt5/TelepathyQt/_gen/cli-channel-dispatcher.h
/usr/include/telepathy-qt5/TelepathyQt/_gen/cli-channel-request.h
/usr/include/telepathy-qt5/TelepathyQt/_gen/cli-channel.h
/usr/include/telepathy-qt5/TelepathyQt/_gen/cli-client.h
/usr/include/telepathy-qt5/TelepathyQt/_gen/cli-connection-manager.h
/usr/include/telepathy-qt5/TelepathyQt/_gen/cli-connection.h
/usr/include/telepathy-qt5/TelepathyQt/_gen/cli-dbus.h
/usr/include/telepathy-qt5/TelepathyQt/_gen/cli-debug-receiver.h
/usr/include/telepathy-qt5/TelepathyQt/_gen/cli-media-session-handler.h
/usr/include/telepathy-qt5/TelepathyQt/_gen/cli-media-stream-handler.h
/usr/include/telepathy-qt5/TelepathyQt/_gen/cli-properties.h
/usr/include/telepathy-qt5/TelepathyQt/_gen/cli-tls-certificate.h
/usr/include/telepathy-qt5/TelepathyQt/_gen/constants.h
/usr/include/telepathy-qt5/TelepathyQt/_gen/svc-call.h
/usr/include/telepathy-qt5/TelepathyQt/_gen/svc-channel.h
/usr/include/telepathy-qt5/TelepathyQt/_gen/svc-connection-manager.h
/usr/include/telepathy-qt5/TelepathyQt/_gen/svc-connection.h
/usr/include/telepathy-qt5/TelepathyQt/_gen/types.h