Improve compilation speed

fairmq/zeromq/FairMQMessageZMQ.cxx

@@ -18,6 +18,8 @@
 #include <fairmq/Tools.h>
 #include "FairMQUnmanagedRegionZMQ.h"
 
+#include <cstring>
+
 using namespace std;
 
 fair::mq::Transport FairMQMessageZMQ::fTransportType = fair::mq::Transport::ZMQ;

fairmq/zeromq/FairMQSocketZMQ.cxx

@@ -12,6 +12,8 @@
 
 #include <zmq.h>
 
+#include <cassert>
+
 using namespace std;
 
 atomic<bool> FairMQSocketZMQ::fInterrupted(false);