Specify dependencies libs explicitly.

Such setup is better for cross compilation. Also changed Makefile to
properly make the project with these libraries.

deps/libnfnetlink/src/nfnl.version

@@ -0,0 +1,55 @@
+NFNETLINK_1.0.1 {
+  global:
+    nfnl_fd;
+    nfnl_portid;
+    nfnl_open;
+    nfnl_close;
+    nfnl_subsys_open;
+    nfnl_subsys_close;
+    nfnl_set_sequence_tracking;
+    nfnl_unset_sequence_tracking;
+    nfnl_set_rcv_buffer_size;
+    nfnl_send;
+    nfnl_sendmsg;
+    nfnl_sendiov;
+    nfnl_fill_hdr;
+    nfnl_talk;
+    nfnl_listen;
+    nfnl_recv;
+    nfnl_callback_register;
+    nfnl_callback_unregister;
+    nfnl_handle_packet;
+    nfnl_parse_hdr;
+    nfnl_check_attributes;
+    nfnl_get_msg_first;
+    nfnl_get_msg_next;
+    nfnl_join;
+    nfnl_process;
+    nfnl_iterator_create;
+    nfnl_iterator_destroy;
+    nfnl_iterator_process;
+    nfnl_iterator_next;
+    nfnl_catch;
+    nfnl_query;
+    nfnl_addattr_l;
+    nfnl_addattr8;
+    nfnl_addattr16;
+    nfnl_addattr32;
+    nfnl_nfa_addattr_l;
+    nfnl_nfa_addattr16;
+    nfnl_nfa_addattr32;
+    nfnl_parse_attr;
+    nfnl_build_nfa_iovec;
+    nfnl_rcvbufsiz;
+    nfnl_dump_packet;
+    nlif_open;
+    nlif_close;
+    nlif_fd;
+    nlif_query;
+    nlif_catch;
+    nlif_index2name;
+    nlif_get_ifflags;
+
+  local:
+    *;
+};