[Bug libstdc++/103890] Generated baseline symbol file seems to have redundant lines

[schwab@linux-m68k.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103890

--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> ---
That's because '/\.dynsym/,/^$/' is matching two regions.  The first region is
the .dynsym section, the second region is starting at the section symbol in the
normal symtab.  The latter produces the unversioned symbols.