I've always heard/thought it was the second one. But because it's all slid, and not picked (much like the other 8ths in there), it's kind of ambiguous alone.
Upon close listening, I still believe it's the second line though. Here's my reasoning - First of all, it sounds played the same to me as the notes before it where it is clearly 8ths, so I don't think he intends to play anything different there.
Secondly, and more conclusively to me, listen to the bass underneath it. It is very clearly playing the extra 8th there, and because it's bass, it's cleanly picking every note with no slides.
But either way, it's not supposed to be individually picked, so if people are picking every 8th, instead of on each 4th, then they're still wrong.