Blender Git Loki

Empty Modifier: Fix build and put in the right order

Bypassing the macro that creates modifiers to allow the enum to be
referring to the Empty modifier, but the internal struct in the code to
be Nodes.

Also fix the name of the new created modifiers to be "Empty".

Fix was built with rBb458ea6b23381a9acb90dbbd73ced678e1d404c5.