scripted-diff: rename CBasicKeyStore to FillableSigningProvider

-BEGIN VERIFY SCRIPT-
git grep -l "CBasicKeyStore" | xargs sed -i -e 's/CBasicKeyStore/FillableSigningProvider/g'
-END VERIFY SCRIPT-

src/rpc/rawtransaction.cpp

@@ -761,7 +761,7 @@ static UniValue signrawtransactionwithkey(const JSONRPCRequest& request)
         throw JSONRPCError(RPC_DESERIALIZATION_ERROR, "TX decode failed");
     }
 
-    CBasicKeyStore keystore;
+    FillableSigningProvider keystore;
     const UniValue& keys = request.params[1].get_array();
     for (unsigned int idx = 0; idx < keys.size(); ++idx) {
         UniValue k = keys[idx];