When the bridge driver encounters an error during network
creation, delete the bridge device if one has been added.
Signed-off-by: Rob Murray <rob.murray@docker.com>
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>
