mboxd: Rename mboxd_msg to transport_mbox

Change-Id: I0f4e206648c02a98fa938a7e582470c8d90904f1
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
diff --git a/test/create_zero_size_window.c b/test/create_zero_size_window.c
index 4f26cd7..14cff6c 100644
--- a/test/create_zero_size_window.c
+++ b/test/create_zero_size_window.c
@@ -4,7 +4,7 @@
 #include <assert.h>
 
 #include "mbox.h"
-#include "mboxd_msg.h"
+#include "transport_mbox.h"
 
 #include "test/mbox.h"
 #include "test/system.h"