Submodule refs in Duplex for cLib pointing to old commit

[boonier]

I think they need updating as when I did a clone with the --recursive flag, I got errors in Duplex looking for HUGE_INT, which exist in latest commit in master but not the Duplex tool directory in this repo

[esaruoho]

how does cLib submodule work nowadays considering the whole cLib repo has been archived, etc?
@boonier