We stdlib now

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diff --git a/ctr-std/src/sync/mod.rs b/ctr-std/src/sync/mod.rs
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+// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! Useful synchronization primitives.
+//!
+//! This module contains useful safe and unsafe synchronization primitives.
+//! Most of the primitives in this module do not provide any sort of locking
+//! and/or blocking at all, but rather provide the necessary tools to build
+//! other types of concurrent primitives.
+
+#![stable(feature = "rust1", since = "1.0.0")]
+
+#[stable(feature = "rust1", since = "1.0.0")]
+pub use alloc::arc::{Arc, Weak};
+#[stable(feature = "rust1", since = "1.0.0")]
+pub use core::sync::atomic;
+
+// Easy cheat until we get proper locks based on libctru code
+#[stable(feature = "3ds", since = "1.0.0")]
+pub use spin::{Mutex, MutexGuard};
+#[stable(feature = "3ds", since = "1.0.0")]
+pub use spin::{RwLock, RwLockReadGuard, RwLockWriteGuard};