Add cling ifdef for TJAlienDNSReoslver

inc/TJAlienDNSResolver.h

@@ -8,10 +8,14 @@
 #include <random>
 #include <cstring>
 
+#if !defined(__CINT__) && !defined(__MAKECINT__) && !defined(__ROOTCLING__) && !defined(__CLING__)
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netdb.h>
 #include <arpa/inet.h>
+#else
+struct addrinfo;
+#endif
 
 using std::string;
 using std::vector;