Restrict use of os.makedirs to those with the security patch introduced in...

Restrict use of os.makedirs to those with the security patch introduced in Python 3.2.6, 3.3.5, and 3.4.1 per https://bugs.python.org/issue21082. Ref #1082.

pkg_resources/py31compat.py

@@ -3,9 +3,6 @@ import errno
 import sys
 
 
-PY32 = sys.version_info >= (3, 2)
-
-
 def _makedirs_31(path, exist_ok=False):
     try:
         os.makedirs(path)
@@ -14,4 +11,12 @@ def _makedirs_31(path, exist_ok=False):
             raise
 
 
-makedirs = os.makedirs if PY32 else _makedirs_31
+# rely on compatibility behavior until mode considerations
+#  and exists_ok considerations are disentangled.
+# See https://github.com/pypa/setuptools/pull/1083#issuecomment-315168663
+needs_makedirs = (
+    sys.version_info <= (3, 2, 6) or
+    (3, 3) <= sys.version_info <= (3, 3, 5) or
+    (3, 4) <= sys.version_info <= (3, 4, 1)
+)
+makedirs = os.makedirs if needs_makedirs else _makedirs_31