python*: upstream patches to fix with glibc-2.25

https://bugs.python.org/issue29157
The 3.6 release already contains the fix (from 3.5);
the branches in-between are claimed to be unaffected.
/cc #22874.

pkgs/development/interpreters/python/cpython/2.7/default.nix

@@ -66,6 +66,8 @@ let
       # libuuid, slowing down program startup a lot).
       ./no-ldconfig.patch
 
+      ./glibc-2.25-enosys.patch
+
     ] ++ optionals stdenv.isCygwin [
       ./2.5.2-ctypes-util-find_library.patch
       ./2.5.2-tkinter-x11.patch