Do not claim copyright for future years yet

[bmwiedemann]

Do not claim copyright for future years yet.

While working on reproducible builds for openSUSE, I found that
without this patch, building python-linstor-1.1.2
later would produce different build results:

+++ new//usr/lib/python3.8/site-packages/linstor/properties.py  2020-06-01 00:00
:00.000000000 +0000
@@ -2,7 +2,7 @@
 This file was autogenerated by genproperties.py

 LINSTOR - management of distributed storage/DRBD9 resources
-Copyright (C) 2017 - 2020  LINBIT HA-Solutions GmbH
+Copyright (C) 2017 - 2035  LINBIT HA-Solutions GmbH
 Author: Rene Peinthor, Gabor Hernadi

See also on this topic:
https://stackoverflow.com/questions/2390230/do-copyright-dates-need-to-be-updated

[bmwiedemann]

Other possible ways to solve this :

• use mtime of a relevant input file
• use SOURCE_DATE_EPOCH
• Have a script in git to autoupdate dates in a commit

[rp-]

thanks, we'll use the mtime approach

[bmwiedemann]

Found commit 6ff3445 and it works fine.