bug#21073: SQLite database creation for binary tarball is non-deterministic

[Ludovic Courtès]

When running ‘make guix-binary.x86_64-linux.tar.xz’ twice (and of course
‘guix gc -d /gnu/store/*-guix-tarball.tar.xz’ in the meantime), one can
see that the ‘db.sqlite’ files in the tarballs have the same size but
differ by a few bytes.

It’s not clear whether this is an issue inherent to SQLite3 or rather
something due to the way we create the database.

(<https://trac.torproject.org/projects/tor/ticket/11630> might give some
ideas.)

Ludo’.