Hermit: Fix initializing lazy locks Closes https://github.com/hermitcore/rusty-hermit/issues/322. The initialization function of hermit's `Condvar` is not called since https://github.com/rust-lang/rust/pull/97647 and was erroneously removed in https://github.com/rust-lang/rust/pull/97879. r? ``@m-ou-se`` CC: ``@stlankes``