Upgrade V8 to 5.1.281.57  DO NOT MERGE

FPIIM-449

Change-Id: Id981b686b4d587ac31697662eb98bb34be42ad90
(cherry picked from commit 3b9bc31999c9787eb726ecdbfd5796bfdec32a18)
diff --git a/tools/run-deopt-fuzzer.py b/tools/run-deopt-fuzzer.py
index e4d8f16..970aa8e 100755
--- a/tools/run-deopt-fuzzer.py
+++ b/tools/run-deopt-fuzzer.py
@@ -71,6 +71,8 @@
                    "ia32",
                    "ppc",
                    "ppc64",
+                   "s390",
+                   "s390x",
                    "mipsel",
                    "nacl_ia32",
                    "nacl_x64",
@@ -321,7 +323,6 @@
     suite = testsuite.TestSuite.LoadTestSuite(
         os.path.join(BASE_DIR, "test", root))
     if suite:
-      suite.SetupWorkingDirectory()
       suites.append(suite)
 
   if options.download_data:
@@ -387,7 +388,8 @@
                         0,  # No use of a rerun-failing-tests maximum.
                         False,  # No predictable mode.
                         False,  # No no_harness mode.
-                        False)   # Don't use perf data.
+                        False,  # Don't use perf data.
+                        False)  # Coverage not supported.
 
   # Find available test suites and read test cases from them.
   variables = {