[packman] Update asunder to version 2.8

[Jonathan Hooverman]

May I ask you to update asunder to the latest version 2.8, see
http://littlesvr.ca/asunder/downloads.php.

Changelog
3 Oct 2015 - 2.8
=================
- Updates to Swedish, Norwegian, Russian, and Danish translations.
- Fixed a couple of (unlikely) memory corruption bugs and some minor
memory leaks.

Thank you very much!

With regards,
Jon.