Added DEFINE GIT_SHA1 in cmake to allow for builds to print their git sha1.
Added DEFINE GIT_SHA1 in cmake to allow for builds to print their git sha1.

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