Bump libc from 0.2.82 to 0.2.84

Bumps [libc](https://github.com/rust-lang/libc) from 0.2.82 to 0.2.84.
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Commits](https://github.com/rust-lang/libc/commits)

Signed-off-by: dependabot[bot] <support@github.com>
3 jobs for dependabot/cargo/libc-0.2.84 in 13 minutes and 46 seconds (queued for 13 seconds)
latest
Status Name Job ID Coverage
  Prepare
passed prepare:docker #1409500
builder

00:01:13

 
  Build
passed build:uhyve #1409501

00:02:47

 
  Test
passed test:demo #1409502
privileged

00:09:45