Is there anything other than that one line? If not, the argument for plagiarism is mighty weak. Standard joke formula + standard precious material = easily repeatable output.

As for its being in Hunger Games, I saw the movie and don't remember it, so it's not on my list of Iconic Hunger Games Moments. Could someone who's a bigger fan than me weigh in on whether the line is important to fans and therefore a target for theft? Otherwise, the whole thing strikes me as a coincidence that no one would have looked twice at if it weren't for CC's name.