LookupServer: Use pledge()

Servers/LookupServer/main.cpp

@@ -1,13 +1,24 @@
 #include "LookupServer.h"
 #include <LibCore/CEventLoop.h>
+#include <stdio.h>
 
 int main(int argc, char** argv)
 {
     (void)argc;
     (void)argv;
 
+    if (pledge("stdio unix inet cpath rpath fattr", nullptr) < 0) {
+        perror("pledge");
+        return 1;
+    }
+
     CEventLoop event_loop;
     LookupServer server;
 
+    if (pledge("stdio unix inet", nullptr) < 0) {
+        perror("pledge");
+        return 1;
+    }
+
     return event_loop.exec();
 }