Rename A64 port to ARM64 port

src/arm64/instrument-arm64.h

Index: src/arm64/instrument-arm64.h
diff --git a/src/a64/instrument-a64.h b/src/arm64/instrument-arm64.h
similarity index 94%
rename from src/a64/instrument-a64.h
rename to src/arm64/instrument-arm64.h
index 79cc1a333be31fe06d71646fac744828ea282cd8..996cc07acb56dd3e01a4cc675d646c950607ba47 100644
--- a/src/a64/instrument-a64.h
+++ b/src/arm64/instrument-arm64.h
@@ -25,13 +25,13 @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#ifndef V8_A64_INSTRUMENT_A64_H_
-#define V8_A64_INSTRUMENT_A64_H_
+#ifndef V8_ARM64_INSTRUMENT_ARM64_H_
+#define V8_ARM64_INSTRUMENT_ARM64_H_
 
 #include "globals.h"
 #include "utils.h"
-#include "a64/decoder-a64.h"
-#include "a64/constants-a64.h"
+#include "arm64/decoder-arm64.h"
+#include "arm64/constants-arm64.h"
 
 namespace v8 {
 namespace internal {
@@ -104,4 +104,4 @@ class Instrument: public DecoderVisitor {
 
 } }  // namespace v8::internal
 
-#endif  // V8_A64_INSTRUMENT_A64_H_
+#endif  // V8_ARM64_INSTRUMENT_ARM64_H_