Update some tests

test/tests/deopt_namescope_tests.py

+# expected: refstatfail
 # skip-if: '-O' in EXTRA_JIT_ARGS
 # statcheck: 4 <= noninit_count('num_deopt') < 50
 # statcheck: 1 <= stats["num_osr_exits"] <= 2

test/tests/name_mangling.py

-# expected: reffail
 # Simple test:
 class MyClass(object):
     __a = 1

test/tests/str_manipulation.py

-# expected: reffail
 # Testing capitalize/title methods.
 
 def test(s):

tools/tester.py

@@ -209,6 +209,8 @@ def get_test_options(fn, check_stats, run_memcheck):
 
     if opts.expected == "reffail":
         opts.expected = "fail"
+    if opts.expected == "refstatfail":
+        opts.expected = "statfail"
 
     if not opts.skip:
         # consider other reasons for skipping file