Mark invalid Test262 test cases correctly.

test/test262/test262.status

Index: test/test262/test262.status
diff --git a/test/test262/test262.status b/test/test262/test262.status
index f947ddb5e100bbe3134be119db734d0586e18bf5..67607fff9bc34a5ac9e78feba1693d53c40a4661 100644
--- a/test/test262/test262.status
+++ b/test/test262/test262.status
@@ -39,14 +39,6 @@ S15.12.2_A1: FAIL
 15.2.3.6-4-415: FAIL
 15.2.3.6-4-420: FAIL
 
-# Temporary disabled until we figure out why it fails on buildbots.
-S15.9.3.1_A5_T1: PASS || FAIL
-S15.9.3.1_A5_T2: PASS || FAIL
-S15.9.3.1_A5_T3: PASS || FAIL
-S15.9.3.1_A5_T4: PASS || FAIL
-S15.9.3.1_A5_T5: PASS || FAIL
-S15.9.3.1_A5_T6: PASS || FAIL
-
 ##################### DELIBERATE INCOMPATIBILITIES #####################
 
 # We deliberately treat arguments to parseInt() with a leading zero as
@@ -78,6 +70,19 @@ S7.8.4_A7.2_T6: FAIL_OK
 S8.5_A2.2: PASS if ($system != linux || $arch == x64), FAIL_OK if ($system == linux && $arch != x64)
 S8.5_A2.1: PASS if ($system != linux || $arch == x64), FAIL_OK if ($system == linux && $arch != x64)
 
+############################ INVALID TESTS #############################
+
+# The reference value calculated by Test262 is incorrect if you run these tests
+# in PST/PDT between first Sunday in March and first Sunday in April. The DST
+# switch was moved in 2007 whereas Test262 bases the reference value on 2000.
+# Test262 Bug: https://bugs.ecmascript.org/show_bug.cgi?id=293
+S15.9.3.1_A5_T1: PASS || FAIL_OK
+S15.9.3.1_A5_T2: PASS || FAIL_OK
+S15.9.3.1_A5_T3: PASS || FAIL_OK
+S15.9.3.1_A5_T4: PASS || FAIL_OK
+S15.9.3.1_A5_T5: PASS || FAIL_OK
+S15.9.3.1_A5_T6: PASS || FAIL_OK
+
 ############################ SKIPPED TESTS #############################
 
 # These tests take a looong time to run in debug mode.