Convert Consonant_Initial_Postfixed to CONS_FINAL

Consonant_Initial_Postfixed was split off of Consonant_Succeeding_Repha,
so it should correspond to the same USE class, CONS_FINAL.

src/gen-use-table.py

@@ -155,8 +155,7 @@ globals().update(property_values)
 
 
 def is_BASE(U, UISC, UGC):
-	# Consonant_Initial_Postfixed is new in Unicode 11; not in the spec.
-	return (UISC in [Number, Consonant, Consonant_Initial_Postfixed, Consonant_Head_Letter,
+	return (UISC in [Number, Consonant, Consonant_Head_Letter,
 			#SPEC-DRAFT Consonant_Placeholder,
 			Tone_Letter,
 			Vowel_Independent #SPEC-DRAFT
@@ -178,7 +177,9 @@ def is_BASE_OTHER(U, UISC, UGC):
 def is_CGJ(U, UISC, UGC):
 	return U == 0x034F
 def is_CONS_FINAL(U, UISC, UGC):
+	# Consonant_Initial_Postfixed is new in Unicode 11; not in the spec.
 	return ((UISC == Consonant_Final and UGC != Lo) or
+		UISC == Consonant_Initial_Postfixed or
 		UISC == Consonant_Succeeding_Repha)
 def is_CONS_FINAL_MOD(U, UISC, UGC):
 	#SPEC-DRAFT return  UISC in [Consonant_Final_Modifier, Syllable_Modifier]

src/hb-ot-shape-complex-use-table.cc

@@ -281,7 +281,7 @@ static const USE_TABLE_ELEMENT_TYPE use_table[] = {
   /* 1A20 */     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,
   /* 1A30 */     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,
   /* 1A40 */     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,
-  /* 1A50 */     B,     B,     B,     B,     B,  MPre,  MBlw,   SUB,  FAbv,  FAbv,     B,   SUB,   SUB,   SUB,   SUB,     O,
+  /* 1A50 */     B,     B,     B,     B,     B,  MPre,  MBlw,   SUB,  FAbv,  FAbv,  FAbv,   SUB,   SUB,   SUB,   SUB,     O,
   /* 1A60 */     H,  VPst,  VAbv,  VPst,  VPst,  VAbv,  VAbv,  VAbv,  VAbv,  VBlw,  VBlw,  VAbv,  VBlw,  VPst,  VPre,  VPre,
   /* 1A70 */  VPre,  VPre,  VPre,  VAbv, VMAbv, VMAbv, VMAbv, VMAbv, VMAbv, VMAbv,  VAbv,    FM,    FM,     O,     O,  FBlw,
   /* 1A80 */     B,     B,     B,     B,     B,     B,     B,     B,     B,     B,     O,     O,     O,     O,     O,     O,