Bug#851479: Proper python3 selection

[Jeremy Bicha]

On Tue, Feb 14, 2017 at 12:43 PM, Ritesh Raj Sarraf <r...@debian.org> wrote:
> Neither of the proposed option works.

It works here (tested on sid) if you use only
-DPython_ADDITIONAL_VERSIONS=3 . The other option doesn't work.

Jeremy