Patch #734231: Update RiscOS support. In particular, correct
riscospath.extsep, and use os.extsep throughout.
diff --git a/Lib/test/test_select.py b/Lib/test/test_select.py
index 1bc2ba9..6a00fe4 100644
--- a/Lib/test/test_select.py
+++ b/Lib/test/test_select.py
@@ -42,7 +42,7 @@
 
 def test():
     import sys
-    if sys.platform[:3] in ('win', 'mac', 'os2'):
+    if sys.platform[:3] in ('win', 'mac', 'os2', 'riscos'):
         if verbose:
             print "Can't test select easily on", sys.platform
         return