please remove the ~amd64 keyword on sys-apps/hexdump, it's been ~amd64 for over a year with no activity in the ChangeLog :) I just compiled it and ran it successfully today.
I guess you ask for stabilization. Removing a keyword means a package doesn't work on the particular architecture
Stabilisation is arch team's responsibility :-) Shouldn't be any problems: package is simple, already stable on most other archs.
InCvs, thanks.