Fix SF #659228, 'realpath' function missing from os.path
Also added realpath = abspath for os2emx, similar to windows/mac
which also don't really implement realpath.
Backport candidate, I think?
diff --git a/Lib/macpath.py b/Lib/macpath.py
index ba9d40b..e3145da 100644
--- a/Lib/macpath.py
+++ b/Lib/macpath.py
@@ -7,7 +7,7 @@
"basename","dirname","commonprefix","getsize","getmtime",
"getatime","getctime", "islink","exists","isdir","isfile",
"walk","expanduser","expandvars","normpath","abspath",
- "supports_unicode_filenames"]
+ "realpath","supports_unicode_filenames"]
# Normalize the case of a pathname. Dummy in Posix, but <s>.lower() here.