[config] Don't disable emoji sequences in HB_TINY

It makes sense to disable this code these if editing is not needed.
However, this is also necessary to correctly display emoji sequences
in right-to-left direction.  For that reason, don't auto-disable it.

src/hb-unicode.cc

diff --git a/src/hb-unicode.cc b/src/hb-unicode.cc
index be87759..ed4fb77 100644
--- a/src/hb-unicode.cc
+++ b/src/hb-unicode.cc
@@ -572,7 +572,7 @@
 /*
  * Emoji
  */
-#ifndef HB_NO_EMOJI
+#ifndef HB_NO_EMOJI_SEQUENCES
 
 #include "hb-unicode-emoji-table.hh"