Add LINK_STATE_* definitions to NetBSD and OpenBSD.

[pusateri]

Description

Add missing interface LINK_STATE_* definitions from sys/net/if.h

Sources

https://github.com/NetBSD/src/blob/54613ac4db31045d0ca58a7e2da7af005c6b5cd2/sys/net/if.h#L207
https://github.com/openbsd/src/blob/bac4ed8757bbe68d4cac117487958588ae27e7c2/sys/net/if.h#L135

Checklist

• [ x] Relevant tests in libc-test/semver have been updated
• [x ] No placeholder or unstable values like *LAST or *MAX are
  included (see #3131)
• [ x] Tested locally (cd libc-test && cargo test --target mytarget);
  especially relevant for platforms that may not be checked in CI

[rustbot]

Some changes occurred in OpenBSD module

cc @semarie