Update SGX's RwLock definition to match `std`#142

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nikic merged 1 commit intorust-lang:rustc/15.0-2022-08-09from

joboet:rustc/15.0-2022-08-09

Nov 6, 2022

Commits on Nov 6, 2022

[rust] update RwLock definition in libunwind to match `std`
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