Log Message:
logswan: update to 2.1.6.

Logswan 2.1.6 (2020-07-03)

- Validate architectures for seccomp
- Minor code shuffling, for consistency with other codebases
- Add seccomp support on i386, tested on glibc and musl
- Remove entry for "Netherlands Antilles" in country table
- Swaziland was officially renamed to Eswatini in 2018
- Macedonia was officially renamed to North Macedonia in February 2019
- Rename Vatican City to Vatican to be consistent with GeoNames naming
- Rename Aland to Aland Islands to be consistent with GeoNames naming