[Indic] Apply 'blwf' before 'half'

This reverts 167b625d98.  It didn't
matter before, but that's going to change with next commit.

src/hb-ot-shape-complex-indic.cc

@@ -344,8 +344,8 @@ indic_features[] =
   {HB_TAG('r','p','h','f'), false},
   {HB_TAG('r','k','r','f'), true},
   {HB_TAG('p','r','e','f'), false},
-  {HB_TAG('h','a','l','f'), false},
   {HB_TAG('b','l','w','f'), false},
+  {HB_TAG('h','a','l','f'), false},
   {HB_TAG('a','b','v','f'), false},
   {HB_TAG('p','s','t','f'), false},
   {HB_TAG('c','f','a','r'), false},
@@ -376,8 +376,8 @@ enum {
   RPHF,
   _RKRF,
   PREF,
-  HALF,
   BLWF,
+  HALF,
   ABVF,
   PSTF,
   CFAR,