dwarf_add_AT_targ_address_b(3) on FreeBSD
The text f9a1364010ed, as FreeBSD 12.0-RELEASE, FreeBSD 11.4-RELEASE, FreeBSD 11.3-RELEASE, FreeBSD 11.2-RELEASE, FreeBSD 11.1-RELEASE, FreeBSD 11.0-RELEASE shipped it.
create and attach address class attributes