gevent/gevent#248 and gevent/gevent#434. Fix test__ares_host_result under PyPy...

gevent/gevent#248 and gevent/gevent#434. Fix test__ares_host_result under PyPy the same way that test_ares_timeout is by simply ignoring it. PyPy now has 4 expected failures; CPython2.7 has one (test__socket_dns6). Includes gevent/gevent#546 with modifications for PyPy.

greentest/test__ares_host_result.py

+from __future__ import print_function
+
 import pickle
+import sys
 import greentest
-from gevent.ares import ares_host_result
+try:
+    from gevent.ares import ares_host_result
+except ImportError as ex:
+    print(ex)
+    sys.exit(0)
+
 
 
 class TestPickle(greentest.TestCase):

known_failures.py

@@ -58,9 +58,6 @@ if PYPY:
     FAILING_TESTS += [
         # Not implemented:
 
-        # ares not supported on PyPy yet
-        'test__ares_host_result.py',
-
         # ---
 
         # BUGS: