Add rng-tools to dependencies (#70)
Add rng-tools to dependencies (#70)

rng-tools will be used to ensure entropy is available for ZFS tests that
use encryption.

Signed-off-by: Tim Crawford <48f173d87e3586da9e8a39aa3b9db9cd24eec5c3@datto.com>
zfsonlinux/zfs-buildbot,gmelikov/zfs-buildbot,zfsonlinux/zfs-buildbot,gmelikov/zfs-buildbot