Update harfbuzz-ng to 0.9.17

third_party/harfbuzz-ng/src/hb-ot-layout.cc

Index: third_party/harfbuzz-ng/src/hb-ot-layout.cc
===================================================================
--- third_party/harfbuzz-ng/src/hb-ot-layout.cc	(리비전 201894)
+++ third_party/harfbuzz-ng/src/hb-ot-layout.cc	(작업 사본)
@@ -70,9 +70,15 @@
   }
 
   for (unsigned int i = 0; i < layout->gsub_lookup_count; i++)
+  {
+    layout->gsub_digests[i].init ();
     layout->gsub->get_lookup (i).add_coverage (&layout->gsub_digests[i]);
+  }
   for (unsigned int i = 0; i < layout->gpos_lookup_count; i++)
+  {
+    layout->gpos_digests[i].init ();
     layout->gpos->get_lookup (i).add_coverage (&layout->gpos_digests[i]);
+  }
 
   return layout;
 }