I agree with
@Boydie, it's almost certainly a harp glissando.
In this review of the John Barry score, whilst this might not be part of your sampled section, it suggests harp was used in the soundtrack so that's a bit of support for this idea.
Bond Lured to Pyramid” is a beautiful track, colourful long-lined string phrases accompanied by florid, fluttering flutes and gorgeous harp glissandi – and that choir again, a rarity in Barry’s Bond scores.
http://www.movie-wave.net/moonraker/