Auto merge of #116088 - nbdd0121:unwind, r=Amanieu,RalfJung · model-checking/verify-rust-std@e057232

Original file line number	Diff line number	Diff line change
`@@ -165,12 +165,12 @@`
`165`	`165`	`//`
`166`	`166`	`// Language features:`
`167`	`167`	`// tidy-alphabetical-start`
	`168`	`+#![cfg_attr(bootstrap, feature(c_unwind))]`
`168`	`169`	`#![cfg_attr(not(test), feature(coroutine_trait))]`
`169`	`170`	`#![cfg_attr(test, feature(panic_update_hook))]`
`170`	`171`	`#![cfg_attr(test, feature(test))]`
`171`	`172`	`#![feature(allocator_internals)]`
`172`	`173`	`#![feature(allow_internal_unstable)]`
`173`		`-#![feature(c_unwind)]`
`174`	`174`	`#![feature(cfg_sanitize)]`
`175`	`175`	`#![feature(const_mut_refs)]`
`176`	`176`	`#![feature(const_precise_live_drops)]`