Merge pull request #47 from RalfJung/silence

silence a warning in our fake std_detect crate

Author: RalfJung

fake/std_detect/lib.rs

@@ -1,3 +1,4 @@
 #![feature(rustc_private, stdarch_internal)]
+#![allow(internal_features)] // yes we are doing very internal stuff here
 extern crate std_detect;
 pub use std_detect::*;