fix broken hammer

The ClashScore functions were not properly exported.
This is BZDNG-387

modules/mol/alg/pymod/wrap_mol_alg.cc

@@ -96,6 +96,7 @@ BOOST_PYTHON_MODULE(_ost_mol_alg)
   export_svdSuperPose();
   export_TrajectoryAnalysis();
   export_StructureAnalysis();
+  export_Clash();
   #if OST_IMG_ENABLED
   export_entity_to_density();
   #endif