nixpkgs

8a6b697a - pythonPackages.cryptography: 1.1.1 -> 1.2.3 (fix openssl build)

pythonPackages.cryptography: 1.1.1 -> 1.2.3 (fix openssl build) (cherry picked from commit baf7f98b454cc2d404f119cd6b0eeecae0d5ac44) [Bjørn: some tweaks needed to apply to release-15.09]