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This means we can debuginfo rpms build with the sdk can be installed.

These can unexpectedly affect what flags rpm picks based on the
outside environment.

This is just way to large for now.

These are not even used anymore

This ensures it always happens, and we don't need to manually do it in the
specfiles.

This is installed already on build.gnome.org, and we don't really need
more that it to build the SDK, so we favour the smaller setuid helper
here.

Now that we have some basic gstreamer plugins the build succeeds.

We don't ship alsa or cdparanoia plugins, as they make little sense
in a container.

Libvisual is also disabled, as its not in yocto. Maybe we should add it though?
Does things use it?

This adds liberation-fonts, gnu-free-fonts, and the
google caladea & carlito fonts. This way we have metric compatible
fonts for the MS core fonts, and a font with a lot of coverage.