BUG: 2087 - Configuration of vtkSlicerVersionConfigure.cmake.in at bu…
…ild time.
vtkSlicerVersionConfigure.cmake was build at configuration time. As reported in bug report 2087 [1], if one updates the source code of Slicer, this file main not always be updated. This patch configures vtkSlicerVersionConfigure.cmake at build time instead.