message: [mint] emit receive event
  this will be used by cli to differentiate fully accepted transactions from transactions that were stored on-chain but didn't produce any writeset
diff: @@ -107,9 +107,8 @@ module LibraAccount {
  Self.create_new_account(copy(payee), 0);
  }
  - // Load the `payee`'s account and deposit the minted `coin`
  - payee_account_ref = borrow_global<T>(move(payee));
  - LibraCoin.deposit(&mut move(payee_account_ref).balance, move(coin));
  + // Deposit the minted `coin`
  + Self.deposit(move(payee), move(coin));
  return;
  }
  