xorg.xf86videointel: Fix build
xorg.xf86videointel: Fix build

Since c2526545844bdbb8347f9d9169a77728bf2bdd73, building xf86videointel
has been broken on my system due to missing libXv. This commit
explicitly includes the dependency when building the package to
hopefully avoid things being broken for others.

NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs,NixOS/nixpkgs