libcamera: thread: Order headers alphabetically

No code change.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/libcamera/thread.cpp

@@ -10,9 +10,9 @@
 #include <atomic>
 #include <condition_variable>
 #include <list>
-#include <unistd.h>
 #include <sys/syscall.h>
 #include <sys/types.h>
+#include <unistd.h>
 
 #include <libcamera/event_dispatcher.h>