/usr/include/samba-4.0/gen_ndr/ is in samba-dev 2:4.1.6+dfsg-1ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/samba-4.0/gen_ndr/atsvc.h
/usr/include/samba-4.0/gen_ndr/auth.h
/usr/include/samba-4.0/gen_ndr/dcerpc.h
/usr/include/samba-4.0/gen_ndr/drsblobs.h
/usr/include/samba-4.0/gen_ndr/drsuapi.h
/usr/include/samba-4.0/gen_ndr/epmapper.h
/usr/include/samba-4.0/gen_ndr/krb5pac.h
/usr/include/samba-4.0/gen_ndr/lsa.h
/usr/include/samba-4.0/gen_ndr/mgmt.h
/usr/include/samba-4.0/gen_ndr/misc.h
/usr/include/samba-4.0/gen_ndr/nbt.h
/usr/include/samba-4.0/gen_ndr/ndr_atsvc.h
/usr/include/samba-4.0/gen_ndr/ndr_atsvc_c.h
/usr/include/samba-4.0/gen_ndr/ndr_dcerpc.h
/usr/include/samba-4.0/gen_ndr/ndr_drsblobs.h
/usr/include/samba-4.0/gen_ndr/ndr_drsuapi.h
/usr/include/samba-4.0/gen_ndr/ndr_epmapper.h
/usr/include/samba-4.0/gen_ndr/ndr_epmapper_c.h
/usr/include/samba-4.0/gen_ndr/ndr_krb5pac.h
/usr/include/samba-4.0/gen_ndr/ndr_mgmt.h
/usr/include/samba-4.0/gen_ndr/ndr_mgmt_c.h
/usr/include/samba-4.0/gen_ndr/ndr_misc.h
/usr/include/samba-4.0/gen_ndr/ndr_nbt.h
/usr/include/samba-4.0/gen_ndr/ndr_samr.h
/usr/include/samba-4.0/gen_ndr/ndr_samr_c.h
/usr/include/samba-4.0/gen_ndr/ndr_svcctl.h
/usr/include/samba-4.0/gen_ndr/ndr_svcctl_c.h
/usr/include/samba-4.0/gen_ndr/netlogon.h
/usr/include/samba-4.0/gen_ndr/samr.h
/usr/include/samba-4.0/gen_ndr/security.h
/usr/include/samba-4.0/gen_ndr/server_id.h
/usr/include/samba-4.0/gen_ndr/svcctl.h