Recognize Elymaic as a right-to-left script
diff --git a/src/hb-common.cc b/src/hb-common.cc
index 5b60ff4..29997a2 100644
--- a/src/hb-common.cc
+++ b/src/hb-common.cc
@@ -574,6 +574,9 @@
     case HB_SCRIPT_OLD_SOGDIAN:
     case HB_SCRIPT_SOGDIAN:
 
+    /* Unicode-12.0 additions */
+    case HB_SCRIPT_ELYMAIC:
+
       return HB_DIRECTION_RTL;