bug#26136: core-updates: python-minimal@2.7.13 fails due to missing zlib

[Danny Milosavljevic]

Hmmm... Python 2.7.13 seems to bundle libffi-3.1. Do we want that?

Also, I checked libffi/configure: If CONFIG_SHELL was set, it would have picked 
it up.

Also, why does Python 2.7.13 try to configure things in the *install* phase ?