/usr/include/x86_64-linux-gnu/ is in liballjoyntcl-dev-1604 16.04-2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/x86_64-linux-gnu/ajtcl/
/usr/include/x86_64-linux-gnu/ajtcl/aj_about.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_ardp.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_auth_listener.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_authentication.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_authorisation.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_bufio.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_bus.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_bus_priv.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_cert.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_config.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_connect.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_conversationhash.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_crc16.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_creds.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_crypto.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_crypto_aes_priv.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_crypto_drbg.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_crypto_ec_p256.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_crypto_ecc.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_crypto_fp.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_crypto_sha2.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_debug.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_disco.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_guid.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_helper.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_init.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_introspect.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_link_timeout.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_msg.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_msg_priv.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_net.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_nvram.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_peer.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_security.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_serial.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_serial_rx.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_serial_tx.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_serio.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_status.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_std.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_target.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_util.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_version.h
/usr/include/x86_64-linux-gnu/ajtcl/aj_wifi_ctrl.h
/usr/include/x86_64-linux-gnu/ajtcl/alljoyn.h
/usr/include/x86_64-linux-gnu/ajtcl/services/
/usr/include/x86_64-linux-gnu/ajtcl/services/ConfigService.h
/usr/include/x86_64-linux-gnu/ajtcl/services/PropertyStore.h
/usr/include/x86_64-linux-gnu/ajtcl/services/PropertyStoreOEMProvisioning.h
/usr/include/x86_64-linux-gnu/ajtcl/services/ServicesCommon.h
/usr/include/x86_64-linux-gnu/ajtcl/services/ServicesHandlers.h