Author attribution of a patch

Hi,

I've created a help patch containing examples for DBCS functions as 
suggested by Jesper Hertel on the l10n mailing list [1]. In Gerrit 
review, I was advised to state his authorship [2], however I was not 
replied how to do it.

Should Jesper send his licence statement to this list and should I 
change commiter's name to his name?
Or in general - how to deal with authorship of patches that are created 
as a result of some collaboration, e.g. in mailing list or bugzilla?

Thanks in advance,
Stanislav

[1] http://listarchives.libreoffice.org/global/l10n/msg08603.html
[2] https://gerrit.libreoffice.org/#/c/14092/