tests: 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>
Reviewed-by: Eric Blake <eblake@redhat.com>
Tested-by: Eric Blake <eblake@redhat.com>
diff --git a/tests/test-coroutine.c b/tests/test-coroutine.c
index f5951cb..dd4ced9 100644
--- a/tests/test-coroutine.c
+++ b/tests/test-coroutine.c
@@ -11,6 +11,7 @@
  *
  */
 
+#include "qemu/osdep.h"
 #include <glib.h>
 #include "qemu/coroutine.h"
 #include "qemu/coroutine_int.h"