Make build reproducible
Not everything is reproducible yet. But most of it is. I propose we fix the last details in a different MR. There are important cleanups in the bootstrap part that should be merged.
What is not:
- appstream-lib
- fontconfig?
- python .pyc and .pyo files
- mandb cache
Follow instructions in utils/reproducible.sh
to test.
Part of #107
Edited by Javier Jardón