PR c++/67711 - assigning from temporary initializer_list.
	PR c++/48562 - new initializer_list.
	* typeck.c (maybe_warn_about_returning_address_of_local): Also warn
	about returning local initializer_list.
	* cp-tree.h (AUTO_TEMP_NAME, TEMP_NAME_P): Remove.
	* call.c (build_over_call): Warn about assignment from temporary
	init_list.
	* init.c (build_new_1): Warn about 'new std::initializer_list'.
	(find_list_begin, maybe_warn_list_ctor): New.
	(perform_member_init): Use maybe_warn_list_ctor.

From-SVN: r260905