Bug#892364: Appstream data points to libreoffice-common

[Olivier Tilloy <olivier.tilloy@canonical.com>]

Package: libreoffice
Version: 1:6.0.2-1

(originally report against the ubuntu package:
https://launchpad.net/bugs/1738821)

Searching for Libreoffice in a software centre which uses Appstream
data (most of them, e.g. gnome-software) brings up Libreoffice but
installs libreoffice-common. This is because it contains
libreoffice-startcenter.desktop which gets extracted into the DEP-11
data. libreoffice-common doesn't depend on anything useful so the user
does not end up with a useful libreoffice install. It would be better
to move this libreoffice-startcenter.desktop file into the libreoffice
meta package.