Blender Git Loki

RNA: provide access to the vertex index array of the Hook modifier.

This allows creating hooks completely without the use of operators.
Also fix subtarget to actually recompute the inverse matrix.

In order to follow the vertex_indices_set function naming convention,
it is necessary to fix makesrna to avoid a naming conflict between
the function wrapper and the property accessor by adding a tag.

Differential Revision: https://developer.blender.org/D4798