cmd/evm: make evm default to all ethash protocol changes

cmd/evm/runner.go

@@ -198,6 +198,8 @@ func runCmd(ctx *cli.Context) error {
 
 	if chainConfig != nil {
 		runtimeConfig.ChainConfig = chainConfig
+	} else {
+		runtimeConfig.ChainConfig = params.AllEthashProtocolChanges
 	}
 	tstart := time.Now()
 	var leftOverGas uint64