[fix] std::sync

Author: rozaliev

src/lib/lazy.rs

@@ -1,8 +1,8 @@
 use std::mem;
-use sync::one;
+use std::sync;
 
 pub struct Lazy<T> {
-    pub lock: one::Once,
+    pub lock: sync::Once,
     pub ptr: *const T,
 }
 
@@ -17,4 +17,4 @@ impl<T> Lazy<T> {
     }
 }
 
-pub const ONCE_INIT: one::Once = one::ONCE_INIT;
+pub const ONCE_INIT: sync::Once = sync::ONCE_INIT;

src/lib/protobuf.rs

@@ -5,7 +5,6 @@
 #![desc = "protobuf implementation for rust"]
 #![license = "BSD"]
 
-extern crate sync;
 extern crate collections;
 
 pub use unknown::UnknownFields;

src/protoc-gen-rust.rs

@@ -3,7 +3,6 @@
 #![allow(non_camel_case_types)]
 
 extern crate protobuf;
-extern crate sync;
 
 use std::io;
 use std::io::Reader;