Work around stage0 to remove '@' requirements from TLS

src/libstd/task/mod.rs

@@ -54,6 +54,10 @@ use util;
 #[cfg(test)] use ptr;
 #[cfg(test)] use task;
 
+#[cfg(stage0)]
+#[path="local_data_priv_stage0.rs"]
+mod local_data_priv;
+#[cfg(not(stage0))]
 mod local_data_priv;
 pub mod rt;
 pub mod spawn;