When doing a non portable build of blender, the executable blender-thumbnailer would be installed in two locations:
/usr/bin/ and /usr/

Having two binaries of the same program installed seems like an oversight, especially since one of them is installed in a incorrect place.

@Campbell Barton (campbellbarton) is there any reason for having an install directive in the cmake files here?
I have no idea about windows, but at least on linux and mac I don't see why we would have that in this file when we already have logic for this in source/creator/CMakeLists.txt.
Perhaps I'm missing something or could we just remove these install instructions all together from the thumbnailer cmake files?