This package was originally internal, but was moved out when BuildKit
used it for its integration tests. That's no longer the case, so we
can make it internal again.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
When building a non-native platform, it's not unpacked by default.
History tries to read the disk usage of all the layer and it doesn't
handle missing snapshots gracefully.
This patch fixes this.
Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
