conf: append 0 0 to nesting helpers mount entries
conf: append 0 0 to nesting helpers mount entries

Otherwise musl's getmntent_r() parser will fail.

Signed-off-by: Christian Brauner <48455ab3070520a2d174545c7239d6d0fabd9a83@ubuntu.com>

hallyn/lxc,hallyn/lxc,ss1h2a3tw/lxc,hallyn/lxc,ss1h2a3tw/lxc,ss1h2a3tw/lxc