relicense `shootout-chameneos-redux.rs` to the shootout license

[TeXitoi]

See #14248

I propose to change the license of shootout-chameneos-redux.rs

Non trivial contributors:

• @TeXitoi: OK
• @killerswan: OK

Contributors appearing in git blame that are trivial (except artifacts as empty lines):

• @alexcrichton: OK
• @kmcallister: OK
• @richo: OK
• @thestinger: OK
• @catamorphism: OK (MoCo employee)
• @pcwalton: OK
• @huonw: OK
• @brson: OK
• @nikomatsakis: OK (MoCo employee)
• @bytbox: OK
• @bjz: OK

Contributors with removed and trivial contributions are not considered.

For the persons that are not in "OK" state, please respond to this issue saying:

I agree to relicense any previous contributions to http://github.com/rust-lang/rust according to the term of the Computer Language Benchmarks Game license (http://benchmarksgame.alioth.debian.org/license.php)

Then, I'll propose the corresponding PR.

Thanks.

[killerswan]

I agree to relicense my contributions to the benchmarks under src/test/bench/ (including shootout-chameneos-redux.rs) according to the terms of the Computer Language Benchmarks Game license (http://benchmarksgame.alioth.debian.org/license.php).

[alexcrichton]

I believe that @catamorphism was a MoCo employee at the time of all his contributions to this benchmark, so we're probably good on that front.