Revert "Revert "Upgrade to 5.0.71.48"" DO NOT MERGE

This reverts commit f2e3994fa5148cc3d9946666f0b0596290192b0e,
and updates the x64 makefile properly so it doesn't break that
build.

FPIIM-449

Change-Id: Ib83e35bfbae6af627451c926a9650ec57c045605
(cherry picked from commit 109988c7ccb6f3fd1a58574fa3dfb88beaef6632)
diff --git a/test/mjsunit/harmony/regress/regress-crbug-578038.js b/test/mjsunit/harmony/regress/regress-crbug-578038.js
new file mode 100644
index 0000000..42774b8
--- /dev/null
+++ b/test/mjsunit/harmony/regress/regress-crbug-578038.js
@@ -0,0 +1,16 @@
+// Copyright 2015 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --harmony-do-expressions
+
+(function testWithoutOtherLiteral() {
+  var result = ((x = [...[42]]) => x)();
+  assertEquals(result, [42]);
+})();
+
+(function testWithSomeOtherLiteral() {
+  []; // important: an array literal before the arrow function
+  var result = ((x = [...[42]]) => x)();  // will core dump, if not fixed.
+  assertEquals(result, [42]);
+})();