[Interpreter] Add option to trace bytecode execution.

src/interpreter/bytecodes.h

Index: src/interpreter/bytecodes.h
diff --git a/src/interpreter/bytecodes.h b/src/interpreter/bytecodes.h
index 4e7707af3f14f6b5a2f3168a60fc87e51fb6f536..9793740bda9d3e189ec7fe965c736ba9e884f60e 100644
--- a/src/interpreter/bytecodes.h
+++ b/src/interpreter/bytecodes.h
@@ -344,6 +344,8 @@ class Register {
                             Register reg4 = Register(),
                             Register reg5 = Register());
 
+  std::string ToString(int parameter_count);
+
   bool operator==(const Register& other) const {
     return index() == other.index();
   }