Hints for xinput-calibrator in main

Hints

• asv-url-not-secure
  org.freedesktop.software.xinput_calibrator.metainfo.xml:17 - http://www.freedesktop.org/wiki/Software/xinput_calibrator/
  Consider using a secure (HTTPS) URL for this web link.
• asv-content-rating-missing
  org.freedesktop.software.xinput_calibrator.metainfo.xml -
  This component has no `content_rating` tag to provide age rating information. You can generate the tag data online by answering a few questions at https://hughsie.github.io/oars/
• asv-developer-info-missing
  org.freedesktop.software.xinput_calibrator.metainfo.xml -
  This component contains no `developer` element with information about its author.