refactor: migrate all servers, apps, binaries to libkos

crates/apps/snake/src/main.rs

@@ -1,14 +1,14 @@
 #![no_std]
 #![no_main]
 
-extern crate userspace_rt;
+extern crate libkos;
 
 use snake::game::{Direction, GameState, Snake};
 use snake::renderer::{self, RenderCommand};
 use types::bounded::CapSlot;
 use types::display::{Color, Dimension, ScreenCoord};
 use types::time::Ticks;
-use userspace_rt::syscall;
+use libkos::syscall;
 use server_framework::Encode;
 use display_server::protocol::DisplayRequest;