Get processor signer/wallet tests working for Ethereum

They are handicapped by the fact Ethereum self-sends don't show up as outputs,
yet that's fundamental (unless we add a *harmful* fallback function).

processor/src/tests/literal/mod.rs

@@ -431,5 +431,7 @@ mod ethereum {
     ethereum_key_gen,
     ethereum_scanner,
     ethereum_no_deadlock_in_multisig_completed,
+    ethereum_signer,
+    ethereum_wallet,
   );
 }