Rename A64 port to ARM64 port

src/arm64/disasm-arm64.h

 // Copyright 2013 the V8 project authors. All rights reserved.
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-#ifndef V8_A64_DISASM_A64_H
-#define V8_A64_DISASM_A64_H
+#ifndef V8_ARM64_DISASM_ARM64_H
+#define V8_ARM64_DISASM_ARM64_H
 
 #include "v8.h"
 
 #include "globals.h"
 #include "utils.h"
-#include "instructions-a64.h"
-#include "decoder-a64.h"
+#include "instructions-arm64.h"
+#include "decoder-arm64.h"
 
 namespace v8 {
 namespace internal {
 
 
 class Disassembler: public DecoderVisitor {
  public:
   Disassembler();
   Disassembler(char* text_buffer, int buffer_size);
   virtual ~Disassembler();
@@ skipping 58 matching lines @@
 
   virtual void ProcessOutput(Instruction* instr);
 
  private:
   FILE *stream_;
 };
 
 
 } }  // namespace v8::internal
 
-#endif  // V8_A64_DISASM_A64_H
+#endif  // V8_ARM64_DISASM_ARM64_H