[interpreter] Add Interpreter{Entry,Exit}Trampoline builtins.

src/compiler/arm64/linkage-arm64.cc

Index: src/compiler/arm64/linkage-arm64.cc
diff --git a/src/compiler/arm64/linkage-arm64.cc b/src/compiler/arm64/linkage-arm64.cc
index 4a601efb22fddaaf84fb74a1519b4a0ba47e036f..99d2d56848d5586b9a20ff335dc28b390968f720 100644
--- a/src/compiler/arm64/linkage-arm64.cc
+++ b/src/compiler/arm64/linkage-arm64.cc
@@ -17,9 +17,15 @@ struct Arm64LinkageHelperTraits {
   static Register ReturnValue2Reg() { return x1; }
   static Register JSCallFunctionReg() { return x1; }
   static Register ContextReg() { return cp; }
-  static Register InterpreterBytecodeOffsetReg() { return x19; }
-  static Register InterpreterBytecodeArrayReg() { return x20; }
-  static Register InterpreterDispatchTableReg() { return x21; }
+  static Register InterpreterBytecodeOffsetReg() {
+    return kInterpreterBytecodeOffsetRegister;
+  }
+  static Register InterpreterBytecodeArrayReg() {
+    return kInterpreterBytecodeArrayRegister;
+  }
+  static Register InterpreterDispatchTableReg() {
+    return kInterpreterDispatchTableRegister;
+  }
   static Register RuntimeCallFunctionReg() { return x1; }
   static Register RuntimeCallArgCountReg() { return x0; }
   static RegList CCalleeSaveRegisters() {