Haven't heard them say that and the scenes are not together.
It's what Naruto says before that 'I have something to tell you, wait for me'. It goes something along the lines of "Do you remember that day?" or something I think (don't quote me on this, my Japanese is rudimentary at best), and it's played during Hinata and Naruto's childhood flashback.
Granted it could be a matter of misleading montage, but for all intents and purposes he does seem to be saying that line to Hinata.
Honestly though, I think there's no point in worrying about any of this. The fandom will jump the gun, obviously; but we're better off simply waiting for next week. We will know who Naruto ends up with much before the movie airs, so by then this movie will probably be a moot point.
The couples have to be resolved in the manga, and NaruSaku still has everyone beat in terms of development. So just try to stay calm and not let the advertising and the fandom hype get too much to you. By this time next week, we'll know 
Edited by Kanae, 31 October 2014 - 05:07 AM.