Hints for gnome-calls in main

Hints

• asv-developer-name-tag-deprecated
  <code>org.gnome.Calls.metainfo.xml:185</code> - <em></em><br/>The toplevel `developer_name` element is deprecated. Please use the `name` element in a `developer` block instead.
• asv-nonstandard-gnome-extension
  <code>org.gnome.Calls.metainfo.xml:366</code> - <em>kudos</em><br/>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.