Previously only unpack operations were supported with chroot. This adds chroot support for packing operations. This prevents potential breakouts when copying data from a container. Signed-off-by: Brian Goff <cpuguy83@gmail.com> (cherry picked from commit 3029e765e241ea2b5249868705dbf9095bc4d529) Signed-off-by: Sebastiaan van Stijn <github@gone.nl> Upstream-commit: 61e0459053c359e322b8d5c017e855f616fd34c0 Component: engine