if ui is set to track the locale automatically and the current locale
has no match in installed resources but has a match in the list of
languages that libreoffice was compiled to contain

so e.g. de_AT locale shouldn't trigger the installation of anything if
langpack-de is already installed and yue_HK shouldn't trigger install
of anything cause that not supported (at time of writing) for libreoffice

put Fedora/RHEL/Ubuntu naming schemes in here.

I moved the lang code from svl to svtools so I could use the restart dialog
to prompt to restart after the langpack is installed, but packagekit's blocking
mode seems to be no longer blocking and control returns immediately which is a
change since the last time I played with this stuff, so drop the restart thing
for now. The lack of a blocking modal also makes the "run this on idle when there's
a toplevel window up and running" a bit futile, but lets keep that for now anyway.

caolanm->rene: I know you'd disable this anyway, so Debian is left out, there's
also config key Office/Common/PackageKit/EnableLangpackInstallation to disable
this too.

Change-Id: Ice731be539850338ccdd8af87839e0b4d83f01e7
Reviewed-on: https://gerrit.libreoffice.org/46856Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>