Hints for gnome-logs in main

Hints

• asv-screenshot-media-url-not-secure
  :242 - http://amigadave.com/temp/gnome-logs-default.png
  Consider using a secure (HTTPS) URL to reference this screenshot image or video.
• asv-url-not-secure
  :251 - http://www.gnome.org/friends/
  Consider using a secure (HTTPS) URL for this web link.
• asv-nonstandard-gnome-extension
  :257 - kudos
  This tag is a GNOME-specific extension to AppStream and not part of the official specification. Do not expect it to work in all implementations and in all software centers.