fix: make sure some macros are available for Python (which requires Tcl/Tk)
fix: make sure some macros are available for Python (which requires Tcl/Tk)

berendkleinhaneveld/VTK,candy7393/VTK,sgh/vtk,Wuteyan/VTK,naucoin/VTKSlicerWidgets,johnkit/vtk-dev,Wuteyan/VTK,msmolens/VTK,biddisco/VTK,mspark93/VTK,berendkleinhaneveld/VTK,johnkit/vtk-dev,jeffbaumes/jeffbaumes-vtk,hendradarwin/VTK,demarle/VTK,msmolens/VTK,SimVascular/VTK,hendradarwin/VTK,sumedhasingla/VTK,jmerkow/VTK,demarle/VTK,msmolens/VTK,gram526/VTK,spthaolt/VTK,Wuteyan/VTK,jmerkow/VTK,jmerkow/VTK,naucoin/VTKSlicerWidgets,keithroe/vtkoptix,arnaudgelas/VTK,collects/VTK,jmerkow/VTK,ashray/VTK-EVM,gram526/VTK,ashray/VTK-EVM,gram526/VTK,aashish24/VTK-old,mspark93/VTK,berendkleinhaneveld/VTK,Wuteyan/VTK,jeffbaumes/jeffbaumes-vtk,collects/VTK,gram526/VTK,SimVascular/VTK,SimVascular/VTK,hendradarwin/VTK,naucoin/VTKSlicerWidgets,keithroe/vtkoptix,sumedhasingla/VTK,sgh/vtk,msmolens/VTK,jmerkow/VTK,aashish24/VTK-old,gram526/VTK,arnaudgelas/VTK,Wuteyan/VTK,keithroe/vtkoptix,hendradarwin/VTK,SimVascular/VTK,berendkleinhaneveld/VTK,hendradarwin/VTK,jmerkow/VTK,jeffbaumes/jeffbaumes-vtk,daviddoria/PointGraphsPhase1,daviddoria/PointGraphsPhase1,daviddoria/PointGraphsPhase1,spthaolt/VTK,arnaudgelas/VTK,mspark93/VTK,sankhesh/VTK,SimVascular/VTK,berendkleinhaneveld/VTK,demarle/VTK,biddisco/VTK,aashish24/VTK-old,keithroe/vtkoptix,spthaolt/VTK,biddisco/VTK,cjh1/VTK,spthaolt/VTK,sankhesh/VTK,berendkleinhaneveld/VTK,demarle/VTK,sankhesh/VTK,msmolens/VTK,demarle/VTK,msmolens/VTK,johnkit/vtk-dev,cjh1/VTK,johnkit/vtk-dev,demarle/VTK,sumedhasingla/VTK,hendradarwin/VTK,sankhesh/VTK,spthaolt/VTK,gram526/VTK,mspark93/VTK,jeffbaumes/jeffbaumes-vtk,aashish24/VTK-old,naucoin/VTKSlicerWidgets,collects/VTK,daviddoria/PointGraphsPhase1,cjh1/VTK,candy7393/VTK,aashish24/VTK-old,sgh/vtk,mspark93/VTK,cjh1/VTK,gram526/VTK,collects/VTK,candy7393/VTK,daviddoria/PointGraphsPhase1,sumedhasingla/VTK,keithroe/vtkoptix,collects/VTK,sankhesh/VTK,ashray/VTK-EVM,demarle/VTK,sgh/vtk,jeffbaumes/jeffbaumes-vtk,sankhesh/VTK,naucoin/VTKSlicerWidgets,keithroe/vtkoptix,Wuteyan/VTK,candy7393/VTK,jmerkow/VTK,cjh1/VTK,Wuteyan/VTK,biddisco/VTK,mspark93/VTK,sgh/vtk,spthaolt/VTK,mspark93/VTK,biddisco/VTK,johnkit/vtk-dev,collects/VTK,johnkit/vtk-dev,johnkit/vtk-dev,biddisco/VTK,candy7393/VTK,naucoin/VTKSlicerWidgets,sumedhasingla/VTK,berendkleinhaneveld/VTK,arnaudgelas/VTK,SimVascular/VTK,sumedhasingla/VTK,ashray/VTK-EVM,SimVascular/VTK,ashray/VTK-EVM,arnaudgelas/VTK,hendradarwin/VTK,candy7393/VTK,candy7393/VTK,jmerkow/VTK,keithroe/vtkoptix,jeffbaumes/jeffbaumes-vtk,biddisco/VTK,SimVascular/VTK,sumedhasingla/VTK,aashish24/VTK-old,sumedhasingla/VTK,msmolens/VTK,sankhesh/VTK,sgh/vtk,daviddoria/PointGraphsPhase1,demarle/VTK,sankhesh/VTK,ashray/VTK-EVM,arnaudgelas/VTK,msmolens/VTK,ashray/VTK-EVM,keithroe/vtkoptix,spthaolt/VTK,gram526/VTK,mspark93/VTK,cjh1/VTK,candy7393/VTK,ashray/VTK-EVM