Bump 'snapgnulib' date.
Drop gdb-rhbz1818011-bfd-gcc10-error.patch.
Drop gdb-rhbz1822715-fix-python-deprecation.patch.
Drop gdb-rhbz1829702-fix-python39.patch.
Drop gdb-rhbz1838777-debuginfod.patch.
Drop gdb-rhbz1844458-use-fputX_unfiltered.patch.
Drop gdb-rhbz1869484-deleted-working-directory.
Adjust build-id related patches.
Ajust VLA patches.
This commit improves the script used to generate the patches from the
upstream git repo. Basically, it removes even more cruft that was
being added by 'git format-patch', making the output really simple and
deterministic (determinism which was a problem before).
Aside from the metadata, nothing else has been changed and therefore
it doesn't justify a new Fedora GDB release.
- chmod +x on the generate-*.sh script.s
- Remove references to gdb-8.0.1 from 'sources' and '.gitignore'.
- Regenerate first line of the patches (remove commit hash).
- Fix empty Source line.
