Uses the tar format to collect multiple output files. It can
be inspected using the regular UNIX tools, but a later commit
will add a specialized tool to perform common tasks.
The tar implementation is enough to fulfill the current needs
without adding a dependency. There's also a small test mostly
to ensure scaffolding is there in case we need to expand the
implementation.
Acked-by: Kenneth Graunke <kenneth@whitecape.org>
Acked-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29146>
