Fix r80180 (backport of r80178): SkipTest => unittest.SkipTest in test_locale

The original commit (r80178) was correct. The bug was introduced during the
backport, funny :-)

Lib/test/test_locale.py

@@ -16,7 +16,7 @@ def get_enUS_locale():
             # The locale test work fine on OSX 10.6, I (ronaldoussoren)
             # haven't had time yet to verify if tests work on OSX 10.5
             # (10.4 is known to be bad)
-            raise SkipTest("Locale support on MacOSX is minimal")
+            raise unittest.SkipTest("Locale support on MacOSX is minimal")
     if sys.platform.startswith("win"):
         tlocs = ("En", "English")
     else: