test: use signDesc.HashType instead of SigHashAll in mockSigner

mock.go

@@ -25,7 +25,7 @@ func (m *mockSigner) SignOutputRaw(tx *wire.MsgTx,
 	privKey := m.key
 
 	sig, err := txscript.RawTxInWitnessSignature(tx, signDesc.SigHashes,
-		signDesc.InputIndex, amt, witnessScript, txscript.SigHashAll,
+		signDesc.InputIndex, amt, witnessScript, signDesc.HashType,
 		privKey)
 	if err != nil {
 		return nil, err
@@ -38,7 +38,7 @@ func (m *mockSigner) ComputeInputScript(tx *wire.MsgTx,
 	signDesc *lnwallet.SignDescriptor) (*lnwallet.InputScript, error) {
 	witnessScript, err := txscript.WitnessSignature(tx, signDesc.SigHashes,
 		signDesc.InputIndex, signDesc.Output.Value,
-		signDesc.Output.PkScript, txscript.SigHashAll, m.key, true)
+		signDesc.Output.PkScript, signDesc.HashType, m.key, true)
 	if err != nil {
 		return nil, err
 	}