Do not record year of build

[bmwiedemann]

This value becomes part of get_version_info output,
but if it is changing every year without any other change,
it cannot be a useful indicator of anything.

Using a constant value, makes the package build reproducible.
See https://reproducible-builds.org/ for why this is good.

https://stackoverflow.com/questions/2390230/do-copyright-dates-need-to-be-updated also suggests, that copyright years do not have to be updated because expiry is counted from death of author, not from date of creation.

[akien-mga]

Fine with me, we'll just have to remember about it when bumping copyright year in headers.

https://stackoverflow.com/questions/2390230/do-copyright-dates-need-to-be-updated also suggests, that copyright years do not have to be updated because expiry is counted from death of author, not from date of creation.

That would be true if Godot had been made in 2007 and then never updated. Then Juan and Ariel could claim copyright from 2007 on their work, and that's it.
But Godot is getting substantially revised all the time, and I think it's fair both to original authors and to new contributors to make the copyright year encompass all of Godot's lifetime, so 2007-now.

[akien-mga]

@hpvb Marking for cherry-picking as I guess openSUSE will want this patch to package 3.0.7+.

[akien-mga]

Now that Godot 3.1 has been released, we don't plan to cherry-pick new features and enhancements to the 3.0 branch, unless there is very strong support in favor of it. Removing cherrypick label for 3.0.