Add some additional built artifacts to .gitignore.
Add some additional built artifacts to .gitignore.

pizcogirl/Astron,blindsighttf2/Astron,ketoo/Astron,ketoo/Astron,ketoo/Astron,ketoo/Astron,blindsighttf2/Astron,blindsighttf2/Astron,pizcogirl/Astron,pizcogirl/Astron,pizcogirl/Astron,blindsighttf2/Astron