OS/2 patches by Andrew I MacIntyre for distutils.

Closes patch #435381.
diff --git a/Lib/distutils/command/bdist.py b/Lib/distutils/command/bdist.py
index fc18bd0..68609f3 100644
--- a/Lib/distutils/command/bdist.py
+++ b/Lib/distutils/command/bdist.py
@@ -57,7 +57,8 @@
     # This won't do in reality: will need to distinguish RPM-ish Linux,
     # Debian-ish Linux, Solaris, FreeBSD, ..., Windows, Mac OS.
     default_format = { 'posix': 'gztar',
-                       'nt': 'zip', }
+                       'nt': 'zip',
+                       'os2': 'zip', }
 
     # Establish the preferred order (for the --help-formats option).
     format_commands = ['rpm', 'gztar', 'bztar', 'ztar', 'tar',