Blender Git Loki

Fix/Workaround for CMake buildinfo error

Correcting the paths for buildinfo to point to the real header,
ended up breaking buildinfo (by not running every build).

It turns out we relied on the output _never_ existing,
so CMake generates a new buildinfo each time.
This is quite bad, but I didn't see a way for CMake to do this,
so explicitly point to a missing file and comment whats going on.