data: install appdata file to correct location
Appdata files used to be installed to /usr/share/appdata
. However,
this location has been changed to /usr/share/metainfo
in recent
versions of the AppStream specification.
Appdata files used to be installed to /usr/share/appdata
. However,
this location has been changed to /usr/share/metainfo
in recent
versions of the AppStream specification.