[Bug other/78839] DWARF output different between GCC 5 and 6

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78839

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
IIRC bitfield are broken for dwarf2/3 and there is another mechanism for them
for dwarf5.