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/compiler/jump-threading.h b/src/compiler/jump-threading.h
index fa74ee9..84520ba 100644
--- a/src/compiler/jump-threading.h
+++ b/src/compiler/jump-threading.h
@@ -18,7 +18,7 @@
   // Compute the forwarding map of basic blocks to their ultimate destination.
   // Returns {true} if there is at least one block that is forwarded.
   static bool ComputeForwarding(Zone* local_zone, ZoneVector<RpoNumber>& result,
-                                InstructionSequence* code);
+                                InstructionSequence* code, bool frame_at_start);
 
   // Rewrite the instructions to forward jumps and branches.
   // May also negate some branches.