Rollup merge of #140398 - Berrysoft:cygwin-backtrace, r=tgross35

Fix backtrace for cygwin

Closes #140304

Depends on:
- [x] rust-lang/backtrace-rs#704

This PR could not be merged until the above PR is merged. I'll update the submodule then.

EDIT: submodule updated.

Author: GuillaumeGomez