Update reno for stable/newton

In order to support automatically updating the release notes when we
create stable branches, we want the pages to be in a standard order.
This patch updates the order to be reverse chronological, so the most
recent notes appear at the top.

Change-Id: I9a79d95953acdb94b676020a91627b8da4964608
Signed-off-by: Doug Hellmann <doug@doughellmann.com>
2 files changed