Rename block_bind_incremental to block_bind_referenced

block_bind_incremental is block_bind_referenced in a loop backwards. For
an 1-inst block, it does the same thing and isn't too much more
expensive, so it's not really useful to keep both.

Also, block_bind_referenced was a better name for the function.

src/builtin.c

@@ -1793,7 +1793,7 @@ int builtins_bind(jq_state *jq, block* bb) {
   builtins = gen_cbinding(function_list, sizeof(function_list)/sizeof(function_list[0]), builtins);
   builtins = gen_builtin_list(builtins);
 
-  *bb = block_bind_incremental(builtins, *bb, OP_IS_CALL_PSEUDO);
+  *bb = block_bind_referenced(builtins, *bb, OP_IS_CALL_PSEUDO);
   *bb = block_drop_unreferenced(*bb);
   return nerrors;
 }