[Interpreter] Add ignition-script-filter flag to filter scripts.

test/test262/testcfg.py

Index: test/test262/testcfg.py
diff --git a/test/test262/testcfg.py b/test/test262/testcfg.py
index 42576642ac6f70d923877b16ea668c0623ebe585..80e7898faaefeb1083c36e18fd1b1219af457d58 100644
--- a/test/test262/testcfg.py
+++ b/test/test262/testcfg.py
@@ -107,7 +107,7 @@ class Test262TestSuite(testsuite.TestSuite):
     self.harness = [os.path.join(self.harnesspath, f)
                     for f in TEST_262_HARNESS_FILES]
     self.harness += [os.path.join(self.root, "harness-adapt.js")]
-    self.ignition_filter = "--ignition-filter=s:" + self.testroot
+    self.ignition_script_filter = "--ignition-script-filter=" + self.testroot
     self.ParseTestRecord = None
 
   def ListTests(self, context):
@@ -131,8 +131,9 @@ class Test262TestSuite(testsuite.TestSuite):
   def GetFlagsForTestCase(self, testcase, context):
     # TODO(rmcilroy) Remove ignition filter modification once ignition can
     # support the test262 test harness code.
-    flags = [ self.ignition_filter if "ignition-filter" in flag else flag
-              for flag in testcase.flags]
+    flags = testcase.flags
+    if '--ignition' in flags:
+      flags += [self.ignition_script_filter]
 
     return (flags + context.mode_flags + self.harness +
             self.GetIncludesForTest(testcase) + ["--harmony"] +