windows: Include for Vista instead of defining CondVar/SRWLock functions ourself

src/libstrongswan/threading/windows/thread.c

@@ -13,15 +13,14 @@
  * for more details.
  */
 
-#include <library.h>
+#include "thread.h"
+
 #include <utils/debug.h>
 #include <threading/spinlock.h>
 #include <threading/thread.h>
 #include <collections/hashtable.h>
 #include <collections/array.h>
 
-#include "thread.h"
-
 
 typedef struct private_thread_t private_thread_t;