[Bug lto/96385] GCC generates separate debug info with undefined symbols without relocations

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96385

--- Comment #8 from H.J. Lu <hjl.tools at gmail dot com> ---
The original pr26324a.o debug info contains reference to xxx.  But reference
to xxx has been removed by LTO.  simple_object_copy_lto_debug_sections fails
to remove the un-referenced symbol, xxx, from symbol table.