ackrc: ignore "asset" directory
ackrc: ignore "asset" directory

This usually contains only media files (like "media") and might be
mounted via sshfs in particular.

scorpiovn/dotfiles,blueyed/dotfiles,blueyed/dotfiles,blueyed/dotfiles,scorpiovn/dotfiles,blueyed/dotfiles,scorpiovn/dotfiles,scorpiovn/dotfiles,blueyed/dotfiles,scorpiovn/dotfiles