There's a merged pull request on the void-packages repository

godot: add correct build name
https://github.com/void-linux/void-packages/pull/46589

Description:
#### Testing the changes
- I tested the changes in this PR: **YES**

#### Local build testing
- I built this PR locally for my native architecture, (x86_64)

It's a minor change that makes debugging and reporting issues for our package easier.
Instead of ".custom_build" the suffix is ".voidlinux".