Rollup merge of rust-lang#110485 - albertlarsan68:fix-bootstrap-lock, r=ozkanonur

Fix bootstrap locking

Fix the regression introduced in rust-lang#108607

Fixes rust-lang#109967

Author: GuillaumeGomez

src/bootstrap/bin/main.rs

@@ -15,10 +15,12 @@ fn main() {
     let args = env::args().skip(1).collect::<Vec<_>>();
     let config = Config::parse(&args);
 
+    #[cfg(all(any(unix, windows), not(target_os = "solaris")))]
+    let mut build_lock;
+    #[cfg(all(any(unix, windows), not(target_os = "solaris")))]
+    let _build_lock_guard;
     #[cfg(all(any(unix, windows), not(target_os = "solaris")))]
     {
-        let mut build_lock;
-        let _build_lock_guard;
         let path = config.out.join("lock");
         build_lock = fd_lock::RwLock::new(t!(std::fs::File::create(&path)));
         _build_lock_guard = match build_lock.try_write() {