auto merge of #15289 : aturon/rust/libstd-stability, r=alexcrichton

Earlier commits have established a baseline of `experimental` stability
for all crates under the facade (so their contents are considered
experimental within libstd). Since `experimental` is `allow` by
default, we should use the same baseline stability for libstd itself.

This commit adds `experimental` tags to all of the modules defined in
`std`, and `unstable` to `std` itself.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/libstd/task.rs b/src/libstd/task.rs
index 6492717d3ec..c20cbea0ae7 100644
--- a/src/libstd/task.rs
+++ b/src/libstd/task.rs
@@ -91,6 +91,8 @@
 //! # }
 //! ```
 
+#![experimental]
+
 use any::Any;
 use comm::channel;
 use io::{Writer, stdio};