Make sure the temporary file is cleaned up even when we raise TestSkipped.

Lib/test/test_largefile.py

@@ -17,7 +17,10 @@ try:
     # 2**31 == 2147483648
     f.seek(2147483649L)
 except OverflowError:
-	raise test_support.TestSkipped, "platform does not have largefile support"
+    f.close()
+    os.unlink(test_support.TESTFN)
+    raise test_support.TestSkipped, \
+          "platform does not have largefile support"
 else:
     f.close()
 
@@ -126,4 +129,4 @@ f.close()
 ##	pass
 
 os.unlink(name)
-
+print >>sys.stderr, name, "exists:", os.path.exists(name)