[Bug libbacktrace/98818] [libbacktrace] Don't throw fatal error for unsupported dwarf version

[jakub at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98818

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
DWARF5 is 4 years old in a few days, and if we didn't switch nothing would be
fixed in the next year either.