I built both from the current git tree less than three days ago and no problems.
Note 1: I am building tdegames with disabled parallel building.
NUMJOBS=-j1 makes no difference. Same failure.
Note 2: tdeaddons depend on tdegames. It is possible that FTBFS occurred following a previous tdegames FTBFS?
I don't know.
I am stuck. No clues.
Darrell