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/function-sent.js b/test/mjsunit/harmony/function-sent.js
new file mode 100644
index 0000000..b3cd644
--- /dev/null
+++ b/test/mjsunit/harmony/function-sent.js
@@ -0,0 +1,90 @@
+// 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-function-sent
+
+
+{
+  function* g() { return function.sent }
+  assertEquals({value: 42, done: true}, g().next(42));
+}
+
+
+{
+  function* g() {
+    try {
+      yield function.sent;
+    } finally {
+      yield function.sent;
+      return function.sent;
+    }
+  }
+
+  {
+    let x = g();
+    assertEquals({value: 1, done: false}, x.next(1));
+    assertEquals({value: 2, done: false}, x.next(2));
+    assertEquals({value: 3, done: true}, x.next(3));
+  }
+
+  {
+    let x = g();
+    assertEquals({value: 1, done: false}, x.next(1));
+    assertEquals({value: 2, done: false}, x.throw(2));
+    assertEquals({value: 3, done: true}, x.next(3));
+  }
+
+  {
+    let x = g();
+    assertEquals({value: 1, done: false}, x.next(1));
+    assertEquals({value: 2, done: false}, x.return(2));
+    assertEquals({value: 3, done: true}, x.next(3));
+  }
+}
+
+
+{
+  function* inner() {
+    try {
+      yield function.sent;
+    } finally {
+      return 666;
+    }
+  }
+
+  function* g() {
+    yield function.sent;
+    yield* inner();
+    return function.sent;
+  }
+
+  {
+    let x = g();
+    assertEquals({value: 1, done: false}, x.next(1));
+    assertEquals({value: undefined, done: false}, x.next(2));
+    assertEquals({value: 3, done: true}, x.next(3));
+  }
+
+  {
+    let x = g();
+    assertEquals({value: 1, done: false}, x.next(1));
+    assertEquals({value: undefined, done: false}, x.next(2));
+    assertEquals({value: 42, done: true}, x.throw(42));
+  }
+
+  {
+    let x = g();
+    assertEquals({value: 1, done: false}, x.next(1));
+    assertEquals({value: undefined, done: false}, x.next(2));
+    assertEquals({value: 42, done: true}, x.return(42));
+  }
+}
+
+
+assertThrows("function f() { return function.sent }", SyntaxError);
+assertThrows("() => { return function.sent }", SyntaxError);
+assertThrows("() => { function.sent }", SyntaxError);
+assertThrows("() => function.sent", SyntaxError);
+assertThrows("({*f() { function.sent }})", SyntaxError);
+assertDoesNotThrow("({*f() { return function.sent }})");