Fixes to run "Hello, world!" on arm64 hardware.

runtime/vm/simulator_arm64.h

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // Declares a Simulator for ARM64 instructions if we are not generating a native
 // ARM64 binary. This Simulator allows us to run and debug ARM64 code generation
 // on regular desktop machines.
 // Dart calls into generated code by "calling" the InvokeDartCode stub,
 // which will start execution in the Simulator or forwards to the real entry
 // on a ARM64 HW platform.
@@ skipping 30 matching lines @@
   // The currently executing Simulator instance, which is associated to the
   // current isolate
   static Simulator* Current();
 
   // Accessors for register state.
   // The default value for R31Type has to be R31IsSP because get_register is
   // accessed from architecture independent code through SPREG without
   // specifying the type. We also can't translate a dummy value for SPREG into
   // a real value because the architecture independent code expects SPREG to
   // be a real register value.
-  void set_register(Register reg, int64_t value, R31Type r31t = R31IsSP);
+  void set_register(
+      Instr* instr, Register reg, int64_t value, R31Type r31t = R31IsSP);
   int64_t get_register(Register reg, R31Type r31t = R31IsSP) const;
   void set_wregister(Register reg, int32_t value, R31Type r31t = R31IsSP);
   int32_t get_wregister(Register reg, R31Type r31t = R31IsSP) const;
 
   int32_t get_vregisters(VRegister reg, int idx) const;
   void set_vregisters(VRegister reg, int idx, int32_t value);
 
   int64_t get_vregisterd(VRegister reg, int idx) const;
   void set_vregisterd(VRegister reg, int idx, int64_t value);
 
@@ skipping 160 matching lines @@
   }
 
   friend class SimulatorDebugger;
   friend class SimulatorSetjmpBuffer;
   DISALLOW_COPY_AND_ASSIGN(Simulator);
 };
 
 }  // namespace dart
 
 #endif  // VM_SIMULATOR_ARM64_H_