Hints for gqrx-sdr in main

Warnings

• asv-desktop-app-launchable-missing
  -
  This `desktop-application` component is missing a `desktop-id` launchable tag. This means that this application can not be launched and has no association with its desktop-entry file. It also means no icon data or category information from the desktop-entry file will be available, which will result in this application being ignored entirely.