libbacktrace: update to latest to fix MacOS backtraces (Sequoia, 2024).

[rustyrussell]

Changelog-Fixed: logging: Fixed crash backtraces on macOS Sequoia.
Reported-by: @sangbida

[sangbida]

This change didn't seem to resolve the libbacktrace: no debug info in Mach-O executable error for me. I think the debug symbols are strored differently to how it's stored on Linux. On Linux the debug symbols are stored directly into the binary where as on macOS debug symbols are stored separately from the binary.

So far I have:

• Added -g to compile flags and removed it from link flags, so my .o files contain full DWARF
• Rebuilt clean
• Run dsymutil lightningd/lightning_hsmd and dsymutil tools/hsmtool and confirmed that

dwarfdump --debug-info lightningd/lightning_hsmd.dSYM/Contents/Resources/DWARF/lightning_hsmd

the debug info contains the compile-unit DIEs.

Despite this, libbacktrace still reports issues. Previously, the error was libbacktrace: no debug info in Mach-O executable after the changes above the error message has changed to libbacktrace: failed to read executable information. This is maybe a mild improvement from before?? because it seems like the debug info is there now but libbacktrace can't find it or understand it? It is also possible that libbacktrace may still be looking for the debug info in a different loacation.

I think I'm going to take a break on this today and look at it again tomorrow hopefully with better luck!