Fix ordering of include paths when running SWIG to use SWIG annotated headers if any.
Fix ordering of include paths when running SWIG to use SWIG annotated headers if any.

opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core,opensim-org/opensim-core