Fix ctypes on 32-bit systems when Python is configured --with-system-ffi.
See also https://bugs.launchpad.net/bugs/72505.

Ported from release25-maint branch.
diff --git a/Misc/NEWS b/Misc/NEWS
index dc2ba59..b51c7fd 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -272,6 +272,9 @@
 Library
 -------
 
+- ctypes will now work correctly on 32-bit systems when Python is
+  configured with --with-system-ffi.
+
 - Patch #1203: ctypes now does work on OS X when Python is built with
   --disable-toolbox-glue