[WebIDL] Prod for T[]

Hi,

Tim Renouf reported the lack of productions for the Array types in
WebIDL:
http://lists.w3.org/Archives/Public/public-script-coord/2009OctDec/0092.html

Assuming Arrays are here to stay, and can be applied to any type at all
(both points that Tim raised and on which I'm afraid I don't know how to
answer), here is the patch that can be applied to the current Editors
draft of WebIDL to add the production for arrays.

HTH,

Dom