util: Clean up includes

Clean up includes so that osdep.h is included first and headers
which it implies are not included manually.

This commit was created with scripts/clean-includes.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1454089805-5470-6-git-send-email-peter.maydell@linaro.org
diff --git a/util/throttle.c b/util/throttle.c
index af4bc95..2f9b23d 100644
--- a/util/throttle.c
+++ b/util/throttle.c
@@ -22,6 +22,7 @@
  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  */
 
+#include "qemu/osdep.h"
 #include "qemu/throttle.h"
 #include "qemu/timer.h"
 #include "block/aio.h"