Make the OT shaper default, even if CoreText or Uniscribe is enabled

src/hb-shaper-list.hh

diff --git a/src/hb-shaper-list.hh b/src/hb-shaper-list.hh
index 6c02de4..b9c029e 100644
--- a/src/hb-shaper-list.hh
+++ b/src/hb-shaper-list.hh
@@ -29,15 +29,11 @@
 #endif /* HB_SHAPER_LIST_HH */ /* Dummy header guards */
 
 /* v--- Add new shapers in the right place here. */
+
 #ifdef HAVE_GRAPHITE2
+/* Only picks up fonts that have a "Silf" table. */
 HB_SHAPER_IMPLEMENT (graphite2)
 #endif
-#ifdef HAVE_UNISCRIBE
-HB_SHAPER_IMPLEMENT (uniscribe)
-#endif
-#ifdef HAVE_CORETEXT
-HB_SHAPER_IMPLEMENT (coretext)
-#endif
 
 #ifdef HAVE_OT
 HB_SHAPER_IMPLEMENT (ot) /* <--- This is our main OpenType shaper. */
@@ -46,9 +42,14 @@
 #ifdef HAVE_HB_OLD
 HB_SHAPER_IMPLEMENT (old)
 #endif
-
 #ifdef HAVE_ICU_LE
 HB_SHAPER_IMPLEMENT (icu_le)
 #endif
+#ifdef HAVE_UNISCRIBE
+HB_SHAPER_IMPLEMENT (uniscribe)
+#endif
+#ifdef HAVE_CORETEXT
+HB_SHAPER_IMPLEMENT (coretext)
+#endif
 
 HB_SHAPER_IMPLEMENT (fallback) /* <--- This should be last. */