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/unicode-regexp-property-class.js b/test/mjsunit/harmony/unicode-regexp-property-class.js
new file mode 100644
index 0000000..323873a
--- /dev/null
+++ b/test/mjsunit/harmony/unicode-regexp-property-class.js
@@ -0,0 +1,64 @@
+// Copyright 2016 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-regexp-property --harmony-unicode-regexps
+
+assertThrows("/\\p/u");
+assertThrows("/\\p{garbage}/u");
+assertThrows("/\\p{}/u");
+assertThrows("/\\p{/u");
+assertThrows("/\\p}/u");
+assertThrows("/\p{Math}/u");
+assertThrows("/\p{Bidi_M}/u");
+assertThrows("/\p{Hex}/u");
+
+assertTrue(/\p{Ll}/u.test("a"));
+assertFalse(/\P{Ll}/u.test("a"));
+assertTrue(/\P{Ll}/u.test("A"));
+assertFalse(/\p{Ll}/u.test("A"));
+assertTrue(/\p{Ll}/u.test("\u{1D7BE}"));
+assertFalse(/\P{Ll}/u.test("\u{1D7BE}"));
+assertFalse(/\p{Ll}/u.test("\u{1D5E3}"));
+assertTrue(/\P{Ll}/u.test("\u{1D5E3}"));
+
+assertTrue(/\p{Ll}/iu.test("a"));
+assertTrue(/\p{Ll}/iu.test("\u{118D4}"));
+assertTrue(/\p{Ll}/iu.test("A"));
+assertTrue(/\p{Ll}/iu.test("\u{118B4}"));
+assertFalse(/\P{Ll}/iu.test("a"));
+assertFalse(/\P{Ll}/iu.test("\u{118D4}"));
+assertFalse(/\P{Ll}/iu.test("A"));
+assertFalse(/\P{Ll}/iu.test("\u{118B4}"));
+
+assertTrue(/\p{Lu}/u.test("A"));
+assertFalse(/\P{Lu}/u.test("A"));
+assertTrue(/\P{Lu}/u.test("a"));
+assertFalse(/\p{Lu}/u.test("a"));
+assertTrue(/\p{Lu}/u.test("\u{1D5E3}"));
+assertFalse(/\P{Lu}/u.test("\u{1D5E3}"));
+assertFalse(/\p{Lu}/u.test("\u{1D7BE}"));
+assertTrue(/\P{Lu}/u.test("\u{1D7BE}"));
+
+assertTrue(/\p{Lu}/iu.test("a"));
+assertTrue(/\p{Lu}/iu.test("\u{118D4}"));
+assertTrue(/\p{Lu}/iu.test("A"));
+assertTrue(/\p{Lu}/iu.test("\u{118B4}"));
+assertFalse(/\P{Lu}/iu.test("a"));
+assertFalse(/\P{Lu}/iu.test("\u{118D4}"));
+assertFalse(/\P{Lu}/iu.test("A"));
+assertFalse(/\P{Lu}/iu.test("\u{118B4}"));
+
+assertTrue(/\p{Sm}/u.test("+"));
+assertFalse(/\P{Sm}/u.test("+"));
+assertTrue(/\p{Sm}/u.test("\u{1D6C1}"));
+assertFalse(/\P{Sm}/u.test("\u{1D6C1}"));
+
+assertTrue(/\pL/u.test("a"));
+assertFalse(/\PL/u.test("a"));
+assertFalse(/\pL/u.test("1"));
+assertTrue(/\PL/u.test("1"));
+assertTrue(/\pL/u.test("\u1FAB"));
+assertFalse(/\PL/u.test("\u1FAB"));
+assertFalse(/\p{L}/u.test("\uA6EE"));
+assertTrue(/\P{L}/u.test("\uA6EE"));