Fix gcc.dg/builtin-apply2.c failures:

Fix gcc.dg/builtin-apply2.c failures:

	* sh.h (TARGET_VARARGS_PRETEND_ARGS): Define.
	* sh.c (extra_push): Delete.
	(sh_expand_prologue): Don't do extra stack adjustment for
	current_function_pretend_args_size if it comes from varargs setup.
	Use TARGET_VARARGS_PRETEND_ARGS.  Don't set extra_push.
	(sh_expand_epilogue): Don't use extra_push.
	(sh_setup_incoming_varargs): Set pretend_arg_size when necessary.

From-SVN: r83864