[config] Add HB_NO_FACE_COLLECT_UNICODES

Part of https://github.com/harfbuzz/harfbuzz/issues/1652
diff --git a/src/hb-config.hh b/src/hb-config.hh
index d7ecf7d..92f0d55 100644
--- a/src/hb-config.hh
+++ b/src/hb-config.hh
@@ -57,6 +57,7 @@
 #define HB_NO_BITMAP
 #define HB_NO_CFF
 #define HB_NO_COLOR
+#define HB_NO_FACE_COLLECT_UNICODES
 #define HB_NO_GETENV
 #define HB_NO_HINTING
 #define HB_NO_LANGUAGE_PRIVATE_SUBTAG