stubs: 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: 1454089805-5470-3-git-send-email-peter.maydell@linaro.org
diff --git a/stubs/qmp_pc_dimm_device_list.c b/stubs/qmp_pc_dimm_device_list.c
index b584bd8..a4af7fe 100644
--- a/stubs/qmp_pc_dimm_device_list.c
+++ b/stubs/qmp_pc_dimm_device_list.c
@@ -1,3 +1,4 @@
+#include "qemu/osdep.h"
 #include "qom/object.h"
 #include "hw/mem/pc-dimm.h"