Fixes to get it compilable, and (almost) linkable.

The problem now is that the list library doesn't seem to be updated yet (#3) and also, the time library seems to bring in an udivdi3/umoddi3 dependency that is yet to be satisfied.

servers/network/ipv4/Rakefile

@@ -11,6 +11,14 @@ OBJECTS = %w(
 )
 
 LIBRARIES = %w(
+  ipc
+  ipv4
+  log
+  memory
+  random
+  time
+  string
+  system
 )
 
 OUTPUT = 'ipv4'

servers/network/ipv4/route.c

@@ -48,13 +48,13 @@ bool route_find(u32 address, ipv4_interface_type **interface,
 
     if (entry == NULL)
     {
-        mutex_signal(interface_list_mutex);
+        mutex_signal(&interface_list_mutex);
         return FALSE;
     }
 
     *interface = entry->interface;
     *ethernet_structure = entry->ethernet_structure;
-    mutex_signal(interface_list_mutex);
+    mutex_signal(&interface_list_mutex);
 
     *direct = FALSE;
     return TRUE;