Do not mask *exec.ExitError
Do not mask *exec.ExitError

Fix #11764

Signed-off-by: Alexander Morozov <lk4d4@docker.com>
(cherry picked from commit f468bbb7e8c89204bd5d8f346ecec4606b9f3b31)

Docker-DCO-1.1-Signed-off-by: Jessie Frazelle <hugs@docker.com> (github: jfrazelle)

Docker-DCO-1.1-Signed-off-by: Jessie Frazelle <princess@docker.com> (github: jfrazelle)

carlye566/docker_eric,carlye566/docker_eric,AdamOssenford/docker-pi,seanmcdaniel/docker,carlye566/docker_eric,seanmcdaniel/docker,josemonsalve2/docker,AdamOssenford/docker-pi,AdamOssenford/docker-pi,josemonsalve2/docker,josemonsalve2/docker,seanmcdaniel/docker