util: Add missing headers to util/fees.cpp

src/util/fees.cpp

@@ -3,8 +3,11 @@
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
+#include <util/fees.h>
+
 #include <policy/fees.h>
 
+#include <map>
 #include <string>
 
 std::string StringForFeeReason(FeeReason reason) {