Deprecate in-tree rand, std::rand and #[derive(Rand)].

Use the crates.io crate `rand` (version 0.1 should be a drop in
replacement for `std::rand`) and `rand_macros` (`#[derive_Rand]` should
be a drop-in replacement).

[breaking-change]

src/test/compile-fail/deriving-span-Rand-enum-struct-variant.rs

@@ -1,25 +0,0 @@
-// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-// This file was auto-generated using 'src/etc/generate-deriving-span-tests.py'
-
-extern crate rand;
-
-
-struct Error;
-
-#[derive(Rand)]
-enum Enum {
-   A {
-     x: Error //~ ERROR
-   }
-}
-
-fn main() {}

src/test/compile-fail/deriving-span-Rand-enum.rs

@@ -1,25 +0,0 @@
-// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-// This file was auto-generated using 'src/etc/generate-deriving-span-tests.py'
-
-extern crate rand;
-
-
-struct Error;
-
-#[derive(Rand)]
-enum Enum {
-   A(
-     Error //~ ERROR
-     )
-}
-
-fn main() {}

src/test/compile-fail/deriving-span-Rand-struct.rs

@@ -1,23 +0,0 @@
-// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-// This file was auto-generated using 'src/etc/generate-deriving-span-tests.py'
-
-extern crate rand;
-
-
-struct Error;
-
-#[derive(Rand)]
-struct Struct {
-    x: Error //~ ERROR
-}
-
-fn main() {}

src/test/compile-fail/deriving-span-Rand-tuple-struct.rs

@@ -1,23 +0,0 @@
-// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-// This file was auto-generated using 'src/etc/generate-deriving-span-tests.py'
-
-extern crate rand;
-
-
-struct Error;
-
-#[derive(Rand)]
-struct Struct(
-    Error //~ ERROR
-);
-
-fn main() {}

src/test/compile-fail/lint-unused-extern-crate.rs

@@ -12,6 +12,7 @@
 
 #![deny(unused_extern_crates)]
 #![allow(unused_variables)]
+#![allow(deprecated)]
 #![feature(libc)]
 #![feature(collections)]
 #![feature(rand)]

src/test/compile-fail/macros-nonfatal-errors.rs

@@ -15,7 +15,6 @@
 #![feature(trace_macros, concat_idents)]
 
 #[derive(Default, //~ ERROR
-           Rand, //~ ERROR
            Zero)] //~ ERROR
 enum CantDeriveThose {}