validation: check for invalid symlink inside container
validation: check for invalid symlink inside container

Deliberately create an invalid read-only symlink that points out of the
container, to see if the test fails inside the container.

Signed-off-by: Dongsu Park <696fb7639d678a1e692fa501217d7509545d7331@kinvolk.io>

opencontainers/ocitools,opencontainers/runtime-tools,opencontainers/runtime-tools,opencontainers/ocitools