kernel: Run prim_tty on_load handler manually

standard_error is started before the on_load handlers in init
are run, so prim_tty will not be completely loaded when running
in embedded mode. So we call it during init of prim_tty instead.

lib/kernel/src/prim_tty.erl

@@ -128,8 +128,6 @@
 %% proc_lib exports
 -export([reader/1, writer/1]).
 
--on_load(on_load/0).
-
 %%-define(debug, true).
 -ifdef(debug).
 -define(dbg(Term), dbg(Term)).
@@ -252,6 +250,8 @@ window_size(State = #state{ tty = TTY }) ->
 -spec init(options()) -> state().
 init(UserOptions) when is_map(UserOptions) ->
 
+    on_load(),
+
     Options = options(UserOptions),
     {ok, TTY} = tty_create(maps:get(ofd, Options)),