evolution: add missing openssl dependency

Fixes recently introduced "ld: cannot find -lcrypto" build error.

pkgs/desktops/gnome-3/3.16/core/evolution-data-server/default.nix

···
 { fetchurl, stdenv, pkgconfig, gnome3, python
-, intltool, libsoup, libxml2, libsecret, icu, sqlite
+, intltool, libsoup, libxml2, libsecret, icu, sqlite, openssl
 , p11_kit, db, nspr, nss, libical, gperf, makeWrapper, valaSupport ? true, vala }:
 
 
···
 
   buildInputs = with gnome3;
     [ pkgconfig glib python intltool libsoup libxml2 gtk gnome_online_accounts
-      gcr p11_kit libgweather libgdata gperf makeWrapper icu sqlite ]
+      gcr p11_kit libgweather libgdata gperf makeWrapper icu sqlite openssl ]
     ++ stdenv.lib.optional valaSupport vala;
 
   propagatedBuildInputs = [ libsecret nss nspr libical db ];