Better split-objs support

I've been using the ``split-objs`` option everywhere for what I believe is over a year now. During this period it has caused zero problems and it produces significantly smaller binaries.

However, it's annoying that packages built with ``split-objs`` are not seperated from packages built normally. So it needs to be enabled all the time if you want the full benefit.

I wondered for how long this feature will remain experimental because it seems to work really well and it would nice for it to be fully supported.