Add MSG_WAITFORONE.try_into().unwrap() to deal with different type signature on musl libc

[billythedummy]

Problem

Related: #28156 , rust-lang/libc#2945

As mentioned in the related issues, due to musl changing the type signature of recvmmsg, solana-streamer cannot compile for target x86_64-unknown-linux-musl.

Summary of Changes

Adding a try_into().unwrap() allows rustc to infer the arg type so that it works for both glibc and musl.

Note that libc is in the process of making a breaking change for this, starting with deprecating the flags: rust-lang/libc#2963 . This change should just serve as a temporary workaround until that change lands.

Fixes #28156

[TheAwiteb]

Why hasn't it been merged yet? See it's clear

[mvines]

Can you please run cargo fmt and update the PR with the result. Doing so should get CI green here. Thanks!

[joncinque]

Looks like this is failing on the audit check, which was fixed in #29587 -- could you rebase and try one more time?

[joncinque]

I'm so sorry, it looks like this needs one more rebase. Can you try that one more time and ping me so I can run CI right away?

[joncinque]

Thanks for your patience, all good finally!