Reland "Remove V8_HOST_CAN_READ_UNALIGNED and its uses."

test/mjsunit/regress/string-compare-memcmp.js

Index: test/mjsunit/regress/string-compare-memcmp.js
diff --git a/test/mjsunit/regress/regress-347912.js b/test/mjsunit/regress/string-compare-memcmp.js
similarity index 52%
copy from test/mjsunit/regress/regress-347912.js
copy to test/mjsunit/regress/string-compare-memcmp.js
index b609e36c3d4981219abcd1c244ab46f849b2863b..45f47343ee84fcd71c94d63a32210c83ca8c091d 100644
--- a/test/mjsunit/regress/regress-347912.js
+++ b/test/mjsunit/regress/string-compare-memcmp.js
@@ -1,10 +1,7 @@
-// Copyright 2014 the V8 project authors. All rights reserved.
+// Copyright 2012 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: --allow-natives-syntax
 
-var __v_4 = {};
-__v_2 = {};
-__v_2[1024] = 0;
-%DebugPrint(__v_4);
+assertEquals(-1, %StringCompare("abc\u0102", "abc\u0201"));