Add stub GDEF files

src/harfbuzz-gdef-private.h

+#ifndef HARFBUZZ_GDEF_PRIVATE_H
+#define HARFBUZZ_GDEF_PRIVATE_H
+
+#include "harfbuzz-private.h"
+#include "harfbuzz-gdef.h"
+
+
+#endif /* HARFBUZZ_GDEF_PRIVATE_H */

src/harfbuzz-gdef.h

+#ifndef HARFBUZZ_GDEF_H
+#define HARFBUZZ_GDEF_H
+
+#include "harfbuzz-common.h"
+
+HARFBUZZ_BEGIN_DECLS();
+
+
+HARFBUZZ_END_DECLS();
+
+#endif /* HARFBUZZ_GDEF_H */

src/harfbuzz-open-private.h

 #ifndef HARFBUZZ_OPEN_PRIVATE_H
 #define HARFBUZZ_OPEN_PRIVATE_H
 
+#include "harfbuzz-private.h"
 #include "harfbuzz-open.h"
 
-#include <stdint.h>
-#include <assert.h>
 #include <glib.h>
 
 /* Macros to convert to/from BigEndian */

src/harfbuzz-private.h

+#ifndef HARFBUZZ_PRIVATE_H
+#define HARFBUZZ_PRIVATE_H
+
+#include <assert.h>
+
+#endif /* HARFBUZZ_PRIVATE_H */

src/main.cc

 #include "harfbuzz-open-private.h"
+#include "harfbuzz-gdef-private.h"
 
 #include <stdlib.h>
 #include <stdio.h>