vtkhdf5: Adjust H5_IS_API macro to handle vtk__ mangling.
vtkhdf5: Adjust H5_IS_API macro to handle vtk__ mangling.

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