[#420] fix freebsd compilation time error (#421)

* [#420] fix freebsd compilation time error

* fix: rustfmt

---------

Co-authored-by: Celeste Sinéad <[email protected]>

Author: yjqg6666

boringtun/src/sleepyinstant/unix.rs

@@ -3,9 +3,19 @@ use std::time::Duration;
 use nix::sys::time::TimeSpec;
 use nix::time::{clock_gettime, ClockId};
 
-#[cfg(any(target_os = "macos", target_os = "ios", target_os = "tvos"))]
+#[cfg(any(
+    target_os = "macos",
+    target_os = "ios",
+    target_os = "tvos",
+    target_os = "freebsd"
+))]
 const CLOCK_ID: ClockId = ClockId::CLOCK_MONOTONIC;
-#[cfg(not(any(target_os = "macos", target_os = "ios", target_os = "tvos")))]
+#[cfg(not(any(
+    target_os = "macos",
+    target_os = "ios",
+    target_os = "tvos",
+    target_os = "freebsd"
+)))]
 const CLOCK_ID: ClockId = ClockId::CLOCK_BOOTTIME;
 
 #[derive(Clone, Copy, Debug)]