File use-libev-cffi.patch of Package python-gevent

From: Antonio Larrosa <alarrosa@suse.com>
Subject: Fix failing tests

libev-cext seems to be broken on i586, so use libev-cffi by default
(also, the gevent documentation mentions that upstream will make
libev-cffi the default soon [1]).

[1] http://www.gevent.org/loop_impls.html#libev

Index: gevent-1.4.0/src/gevent/_config.py
===================================================================
--- gevent-1.4.0.orig/src/gevent/_config.py
+++ gevent-1.4.0/src/gevent/_config.py
@@ -352,8 +352,8 @@ class Loop(ImportableSetting, Setting):
     """
 
     default = [
-        'libev-cext',
         'libev-cffi',
+        'libev-cext',
         'libuv-cffi',
     ] if not WIN else [
         'libuv-cffi',