Hints for malcontent in testing

Hints

• asv-cid-missing-affiliation-gnome
  :4 - org.freedesktop.MalcontentControl
  The component is part of the GNOME project, but its ID does not start with GNOMEs reverse-DNS name ("org.gnome").
• asv-unknown-tag
  :131 - developer
  Found invalid tag. Non-standard tags should be prefixed with `x-`. AppStream also provides the <custom/> tag to add arbitrary custom data to metainfo files. This tag is read by AppStream libraries and may be useful instead of defining new custom toplevel or `x-`-prefixed tags if you just want to add custom data to a metainfo file.