all: 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: 1454089805-5470-16-git-send-email-peter.maydell@linaro.org

trace/ftrace.c

@@ -9,10 +9,7 @@
  *
  */
 
-#include <stdio.h>
-#include <string.h>
-#include <fcntl.h>
-#include <limits.h>
+#include "qemu/osdep.h"
 #include "trace.h"
 #include "trace/control.h"