Auto merge of #284 - fiveop:fix_build, r=posborne

Make crate libc import public.

On currently nightly I got an error regarding the public export of libc in sys::ioctl. It now requires us to import the extern crate publicly.

Author: homu

src/lib.rs

@@ -13,7 +13,7 @@
 #[macro_use]
 extern crate bitflags;
 
-extern crate libc;
+pub extern crate libc;
 
 #[cfg(test)]
 extern crate nix_test as nixtest;