Clean up makefiles for TTS data files.

This makes them look more like product definition files
that can better fit in a product inheritance chain.

Also, add a product definition file that includes all
languages (amusingly, that's the only combination
that's ever used).

Bug: 3065214
Change-Id: I42ef6038b7bda5a045562505e4bb2308e36b09f7
8 files changed