Update copyright years to reflect reality.
Update copyright years to reflect reality.

* build/get-py-info.py:
  Update copyright year based on files actual history.

Suggested by: Karl Fogel

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion