linux-user: Implement pivot_root

Used by runc.

Signed-off-by: YAMAMOTO Takashi <yamamoto@midokura.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20210531055019.10149-6-yamamoto@midokura.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
1 file changed