Try to fix a cmake build

Author: tuexen

CMakeLists.txt

@@ -110,7 +110,7 @@ if (have_netinet_ip_icmp_h)
 	add_definitions(-DHAVE_NETINET_IP_ICMP_H)
 endif ()
 
-check_include_files("net/route.h" have_net_route_h)
+check_include_files("sys/types.h;sys/socket.h;net/route.h" have_net_route_h)
 if (have_net_route_h)
 	add_definitions(-DHAVE_NET_ROUTE_H)
 endif ()