Add a few more NEWS items.

Fix a typo in the generation of top_srcdir NEWS.

Change-Id: I20a140a68b9afca5096d33d99a3ea5d24e776f05
Reviewed-on: https://code.wireshark.org/review/3626
Tested-by: Gerald Combs <gerald@wireshark.org>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: Michael Mann <mmann78@netscape.net>