Foxconn supply many companies with many parts. I would suspect Apple are one of the bigger customers so they wouldn't be all that fussed about it.
On a second moment of contemplation, I suspect that Apple might want to avoid taking them to court over it as the whole Samsung thing backfired on them royally and actually raised awareness of their competitors products. Was probably the best example in history of the phrase, 'There is no such thing as bad publicity'.