bpo-27794: Add `name` attribute to `property` class (GH-23967)

diff --git a/Lib/test/test_sys.py b/Lib/test/test_sys.py
index 3860656..3af5b11 100644
--- a/Lib/test/test_sys.py
+++ b/Lib/test/test_sys.py
@@ -1329,7 +1329,7 @@ def getx(self): return self.__x
             def setx(self, value): self.__x = value
             def delx(self): del self.__x
             x = property(getx, setx, delx, "")
-            check(x, size('4Pi'))
+            check(x, size('5Pi'))
         # PyCapsule
         # XXX
         # rangeiterator