Update to most recent test262 version.

test/test262/testcfg.py

Index: test/test262/testcfg.py
diff --git a/test/test262/testcfg.py b/test/test262/testcfg.py
index e4a3bdeaaf7d8024765abafb1cc27feac188d7d2..fc03c4d02e56f833487506be9f3c8a18a719ce0a 100644
--- a/test/test262/testcfg.py
+++ b/test/test262/testcfg.py
@@ -34,8 +34,8 @@ import hashlib
 import tarfile
 
 
-TEST_262_ARCHIVE_REVISION = '3a890174343c'  # This is the r309 revision.
-TEST_262_ARCHIVE_MD5 = 'be5d4cfbe69cef70430907b8f3a92b50'
+TEST_262_ARCHIVE_REVISION = 'fb327c439e20'  # This is the r334 revision.
+TEST_262_ARCHIVE_MD5 = '307acd166ec34629592f240dc12d57ed'
 TEST_262_URL = 'http://hg.ecmascript.org/tests/test262/archive/%s.tar.bz2'
 TEST_262_HARNESS = ['sta.js']
 
@@ -114,6 +114,7 @@ class Test262TestConfiguration(test.TestConfiguration):
         for chunk in iter(lambda: f.read(8192), ''):
           md5.update(chunk)
       if md5.hexdigest() != TEST_262_ARCHIVE_MD5:
+        os.remove(archive_name)
         raise Exception("Hash mismatch of test data file")
       archive = tarfile.open(archive_name, 'r:bz2')
       archive.extractall(join(self.root))