multi: update to latest btcd version

With this commit we update btcd to the latest version which allows us to
specify the btcd binary we want to use when spinning up a new node.

chainntnfs/interface_test.go

@@ -1067,7 +1067,9 @@ func testReorgConf(miner *rpctest.Harness,
 	notifier chainntnfs.TestChainNotifier, scriptDispatch bool, t *testing.T) {
 
 	// Set up a new miner that we can use to cause a reorg.
-	miner2, err := rpctest.New(chainntnfs.NetParams, nil, []string{"--txindex"})
+	miner2, err := rpctest.New(
+		chainntnfs.NetParams, nil, []string{"--txindex"}, "",
+	)
 	if err != nil {
 		t.Fatalf("unable to create mining node: %v", err)
 	}
@@ -1247,7 +1249,9 @@ func testReorgSpend(miner *rpctest.Harness,
 	}
 
 	// Set up a new miner that we can use to cause a reorg.
-	miner2, err := rpctest.New(chainntnfs.NetParams, nil, []string{"--txindex"})
+	miner2, err := rpctest.New(
+		chainntnfs.NetParams, nil, []string{"--txindex"}, "",
+	)
 	if err != nil {
 		t.Fatalf("unable to create mining node: %v", err)
 	}
@@ -1592,7 +1596,9 @@ func testCatchUpOnMissedBlocksWithReorg(miner1 *rpctest.Harness,
 	var wg sync.WaitGroup
 
 	// Set up a new miner that we can use to cause a reorg.
-	miner2, err := rpctest.New(chainntnfs.NetParams, nil, []string{"--txindex"})
+	miner2, err := rpctest.New(
+		chainntnfs.NetParams, nil, []string{"--txindex"}, "",
+	)
 	if err != nil {
 		t.Fatalf("unable to create mining node: %v", err)
 	}

chainntnfs/test_utils.go

@@ -177,7 +177,7 @@ func NewMiner(t *testing.T, extraArgs []string, createChain bool,
 	trickle := fmt.Sprintf("--trickleinterval=%v", TrickleInterval)
 	extraArgs = append(extraArgs, trickle)
 
-	node, err := rpctest.New(NetParams, nil, extraArgs)
+	node, err := rpctest.New(NetParams, nil, extraArgs, "")
 	if err != nil {
 		t.Fatalf("unable to create backend node: %v", err)
 	}