Updated Slovenian translation
Correctly use gettext call

Variable interpolation must happen on the result of the gettext call.
[l10n] New translation for Afrikaans (af)
Added TE translation
Updated Malayalam Translation
Tajik translation updated
Updated Spanish translation
Updated Galician translations
Updated Greek translation
Updated Dutch translation
Do not ship a broken AppData file

We need to use intltool to convert the .xml.in file into a .xml file as this
actually merges in the translations. Doing this in autoconf works for paths,
but not translations.

With this change gnome-music correctly shows up in gnome-software.