Use a breakpoint instruction for a stop message on arm instead of

runtime/vm/constants_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.
 
 #ifndef VM_CONSTANTS_ARM64_H_
 #define VM_CONSTANTS_ARM64_H_
 
 #include "platform/assert.h"
 
 namespace dart {
@@ skipping 795 matching lines @@
   static const int32_t kBreakPointInstruction =  // brk(0xdeb0).
       BRK | (kBreakPointCode << kImm16Shift);
 
   // Breakpoint instruction used by the simulator.
   // Should be distinct from kBreakPointInstruction and from a typical user
   // breakpoint inserted in generated code for debugging, e.g. brk(0).
   static const int32_t kSimulatorBreakpointInstruction =
       HLT | (kSimulatorBreakCode << kImm16Shift);
 
   // Runtime call redirection instruction used by the simulator.
-  static const int32_t kRedirectInstruction =
+  static const int32_t kSimulatorRedirectInstruction =
       HLT | (kSimulatorRedirectCode << kImm16Shift);
 
   // Read one particular bit out of the instruction bits.
   inline int Bit(int nr) const {
     return (InstructionBits() >> nr) & 1;
   }
 
   // Read a bit field out of the instruction bits.
   inline int Bits(int shift, int count) const {
     return (InstructionBits() >> shift) & ((1 << count) - 1);
@@ skipping 231 matching lines @@
   static Instr* At(uword pc) { return reinterpret_cast<Instr*>(pc); }
 
  private:
   DISALLOW_ALLOCATION();
   DISALLOW_IMPLICIT_CONSTRUCTORS(Instr);
 };
 
 }  // namespace dart
 
 #endif  // VM_CONSTANTS_ARM64_H_