BUG: Missing include for tcl wrapping
BUG: Missing include for tcl wrapping

commit 6e21b6b removed ${CMAKE_CURRENT_SOURCE_DIR} from
include_directories. This caused compile errors for
Wrapping/vtkTkAppInit which could not find vtkTcl.h.

Change-Id: If9580010566cf60e7a4c45e49073e477826ea21e

sankhesh/VTK,keithroe/vtkoptix,collects/VTK,hendradarwin/VTK,jmerkow/VTK,SimVascular/VTK,johnkit/vtk-dev,jmerkow/VTK,mspark93/VTK,SimVascular/VTK,mspark93/VTK,candy7393/VTK,sumedhasingla/VTK,gram526/VTK,msmolens/VTK,sankhesh/VTK,biddisco/VTK,ashray/VTK-EVM,sumedhasingla/VTK,SimVascular/VTK,berendkleinhaneveld/VTK,biddisco/VTK,gram526/VTK,gram526/VTK,johnkit/vtk-dev,gram526/VTK,jmerkow/VTK,keithroe/vtkoptix,sankhesh/VTK,berendkleinhaneveld/VTK,sankhesh/VTK,johnkit/vtk-dev,ashray/VTK-EVM,collects/VTK,demarle/VTK,biddisco/VTK,msmolens/VTK,mspark93/VTK,johnkit/vtk-dev,SimVascular/VTK,aashish24/VTK-old,msmolens/VTK,jmerkow/VTK,johnkit/vtk-dev,jmerkow/VTK,candy7393/VTK,berendkleinhaneveld/VTK,mspark93/VTK,jmerkow/VTK,sumedhasingla/VTK,aashish24/VTK-old,demarle/VTK,keithroe/vtkoptix,sankhesh/VTK,msmolens/VTK,aashish24/VTK-old,ashray/VTK-EVM,SimVascular/VTK,demarle/VTK,ashray/VTK-EVM,sumedhasingla/VTK,collects/VTK,collects/VTK,mspark93/VTK,keithroe/vtkoptix,SimVascular/VTK,sumedhasingla/VTK,candy7393/VTK,msmolens/VTK,gram526/VTK,demarle/VTK,hendradarwin/VTK,ashray/VTK-EVM,candy7393/VTK,msmolens/VTK,aashish24/VTK-old,hendradarwin/VTK,biddisco/VTK,keithroe/vtkoptix,gram526/VTK,johnkit/vtk-dev,hendradarwin/VTK,berendkleinhaneveld/VTK,biddisco/VTK,msmolens/VTK,sumedhasingla/VTK,biddisco/VTK,demarle/VTK,hendradarwin/VTK,sumedhasingla/VTK,demarle/VTK,msmolens/VTK,biddisco/VTK,jmerkow/VTK,jmerkow/VTK,berendkleinhaneveld/VTK,keithroe/vtkoptix,candy7393/VTK,SimVascular/VTK,candy7393/VTK,collects/VTK,johnkit/vtk-dev,mspark93/VTK,candy7393/VTK,sankhesh/VTK,gram526/VTK,sankhesh/VTK,ashray/VTK-EVM,berendkleinhaneveld/VTK,ashray/VTK-EVM,hendradarwin/VTK,demarle/VTK,mspark93/VTK,candy7393/VTK,berendkleinhaneveld/VTK,demarle/VTK,ashray/VTK-EVM,aashish24/VTK-old,hendradarwin/VTK,sumedhasingla/VTK,collects/VTK,gram526/VTK,keithroe/vtkoptix,SimVascular/VTK,sankhesh/VTK,keithroe/vtkoptix,aashish24/VTK-old,mspark93/VTK