Fix Provides: bundled(*), remove no longer used BR pkgconfig(protobuf).
* Sun Jan 23 2022 Kevin Kofler <Kevin@tigcc.ticalc.org> - 5.15.8-2
- Update Provides: bundled(*) version numbers, remove ones dropped upstream
- Restore Provides: bundled(protobuf), unbundling support dropped years ago
- Remove no longer used BuildRequires: yasm and pkgconfig(protobuf)