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/interpreter/bytecode-array-iterator.h b/src/interpreter/bytecode-array-iterator.h
index e67fa97..5379bbf 100644
--- a/src/interpreter/bytecode-array-iterator.h
+++ b/src/interpreter/bytecode-array-iterator.h
@@ -21,6 +21,7 @@
   bool done() const;
   Bytecode current_bytecode() const;
   int current_bytecode_size() const;
+  void set_current_offset(int offset) { bytecode_offset_ = offset; }
   int current_offset() const { return bytecode_offset_; }
   const Handle<BytecodeArray>& bytecode_array() const {
     return bytecode_array_;
@@ -28,8 +29,9 @@
 
   int8_t GetImmediateOperand(int operand_index) const;
   int GetIndexOperand(int operand_index) const;
-  int GetCountOperand(int operand_index) const;
+  int GetRegisterCountOperand(int operand_index) const;
   Register GetRegisterOperand(int operand_index) const;
+  int GetRegisterOperandRange(int operand_index) const;
   Handle<Object> GetConstantForIndexOperand(int operand_index) const;
 
   // Get the raw byte for the given operand. Note: you should prefer using the