Moved all the content of the DDK files ntdef.h and ntddk.h to
winternl.h.

diff --git a/loader/task.c b/loader/task.c
index ab7884d..ce673e2 100644
--- a/loader/task.c
+++ b/loader/task.c
@@ -40,7 +40,7 @@
 #include "instance.h"
 #include "miscemu.h"
 #include "module.h"
-#include "ntddk.h"
+#include "winternl.h"
 #include "selectors.h"
 #include "wine/server.h"
 #include "syslevel.h"