[cubic-glyf] Add HB_NO_CUBIC_GLYF
diff --git a/src/hb-config.hh b/src/hb-config.hh
index 0ff1f1c..047518b 100644
--- a/src/hb-config.hh
+++ b/src/hb-config.hh
@@ -37,6 +37,7 @@
 
 #ifndef HB_EXPERIMENTAL_API
 #define HB_NO_BEYOND_64K
+#define HB_NO_CUBIC_GLYF
 #define HB_NO_VAR_COMPOSITES
 #endif