Add missing font files to SDK system images.

This adds a few missing font families to SDK system images.
This allows, in particular, support for the Korean language.

Note that this depends on other patches under device/generic/
to fix some board and product configuration files, otherwise
this change will have no effect.

See http://b.android.com/40340

Change-Id: Idba6471de32232833f511a4da97fd652906fec51