Minor update of date references.

git-svn-id: https://svn.modelica.org/projects/Modelica/trunk@6218 7ce873d0-865f-4ce7-a662-4bb36ea78beb
Update versonDate

git-svn-id: https://svn.modelica.org/projects/Modelica/trunk@6219 7ce873d0-865f-4ce7-a662-4bb36ea78beb