net: 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: 1454089805-5470-11-git-send-email-peter.maydell@linaro.org
diff --git a/net/vhost-user.c b/net/vhost-user.c
index e4dd089..451dbbf 100644
--- a/net/vhost-user.c
+++ b/net/vhost-user.c
@@ -8,6 +8,7 @@
  *
  */
 
+#include "qemu/osdep.h"
 #include "clients.h"
 #include "net/vhost_net.h"
 #include "net/vhost-user.h"