[Bug sanitizer/77631] no symbols in backtrace shown by ASan when debug info is split

[ian at airs dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77631

--- Comment #12 from Ian Lance Taylor <ian at airs dot com> ---
I don't think this is a dup of 67165, which is about compressed debug sections.
 This PR is about debug info in separate files.