Fixes an issue where `VOLUME some_name:/foo` would be parsed as a named volume, allowing access from the builder to any volume on the host. This makes sure that named volumes must always be passed in as a bind. Signed-off-by: Brian Goff <cpuguy83@gmail.com> Upstream-commit: 8e5bb8fdd37879ec04c3419b8ecfce7a0477cdcf Component: engine