[OT] Apply 'rclt' feature in horizontal mode

'rclt' is "Required Contextual Forms" being proposed by Microsoft.
It's like 'calt', but supposedly always on.  We apply 'calt' anyway,
and now apply this too.

diff --git a/src/hb-ot-shape.cc b/src/hb-ot-shape.cc
index 08457be..9e1a4c4 100644 (file)
--- a/src/hb-ot-shape.cc
+++ b/src/hb-ot-shape.cc
@@ -54,6 +54,7 @@ hb_tag_t horizontal_features[] = {
   HB_TAG('c','l','i','g'),
   HB_TAG('c','u','r','s'),
   HB_TAG('k','e','r','n'),
+  HB_TAG('r','c','l','t'),
 };
 
 /* Note: