[4.0] Calc+Base fail without registry/writer.xcd from Writer package

[Andreas Radke]

We are running in a bug with the current package file lists making Calc
and Base to fail to load without having Writer installed. Check

https://bugs.archlinux.org/task/34332 and
https://bugs.archlinux.org/task/34378.

It turns out that Calc and Base now need 
/usr/lib/libreoffice/share/registry/writer.xcd present on the system.

Is this a wanted change or a bug?

-Andy
ArchLinux