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/src/context-measure.cc b/src/context-measure.cc
index 0b87e39..3423629 100644
--- a/src/context-measure.cc
+++ b/src/context-measure.cc
@@ -30,7 +30,7 @@
   if (object->IsSharedFunctionInfo()) return true;
   if (object->IsScopeInfo()) return true;
   if (object->IsCode() && !Code::cast(object)->is_optimized_code()) return true;
-  if (object->IsExecutableAccessorInfo()) return true;
+  if (object->IsAccessorInfo()) return true;
   if (object->IsWeakCell()) return true;
   return false;
 }