build: update to latest btcwallet commit

In this commit we update to the latest version of btcwallet which will
properly detect bitcoind rejections when attempting to retransmit
unmnined transaction on restart. Additionally, we'll now remove any
transaction that are rejected from the mempool at broadcast time.

Related to #1030.

Gopkg.lock

@@ -225,7 +225,7 @@
     "walletdb/bdb",
     "wtxmgr"
   ]
-  revision = "257011e9f113aeea4720f03f732a19753a4599e1"
+  revision = "41f0e0145c5a4d1b90105dcccf0cbe5d22372eed"
 
 [[projects]]
   branch = "master"
@@ -359,6 +359,6 @@
 [solve-meta]
   analyzer-name = "dep"
   analyzer-version = 1
-  inputs-digest = "d44fdb714a5db6aaf13db17cc517a8f0acdb4aa1a421030ce8cba96e9b3e48fe"
+  inputs-digest = "25f631ecffcdb9df5a8675cd1fee102ee89a39a64dd8a467667a257d35f816e0"
   solver-name = "gps-cdcl"
   solver-version = 1

Gopkg.toml

@@ -64,7 +64,7 @@
 
 [[constraint]]
   name = "github.com/roasbeef/btcwallet"
-  revision = "257011e9f113aeea4720f03f732a19753a4599e1"
+  revision = "41f0e0145c5a4d1b90105dcccf0cbe5d22372eed"
 
 [[constraint]]
   name = "github.com/tv42/zbase32"