Stop using macro_escape as an inner attribute

In preparation for the rename.

src/libstd/thread_local/mod.rs

@@ -34,13 +34,13 @@
 //! will want to make use of some form of **interior mutability** through the
 //! `Cell` or `RefCell` types.
 
-#![macro_escape]
 #![stable]
 
 use prelude::v1::*;
 
 use cell::UnsafeCell;
 
+#[macro_escape]
 pub mod scoped;
 
 // Sure wish we had macro hygiene, no?

src/libstd/thread_local/scoped.rs

@@ -38,7 +38,6 @@
 //! });
 //! ```
 
-#![macro_escape]
 #![unstable = "scoped TLS has yet to have wide enough use to fully consider \
                stabilizing its interface"]