libstd: set baseline stability levels.

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/c_vec.rs b/src/libstd/c_vec.rs
index 1926d6b1b96..a7d697c8665 100644
--- a/src/libstd/c_vec.rs
+++ b/src/libstd/c_vec.rs
@@ -33,6 +33,8 @@
 //! handled correctly, i.e. that allocated memory is eventually freed
 //! if necessary.
 
+#![experimental]
+
 use collections::Collection;
 use kinds::Send;
 use mem;