future (_State_baseV2::_M_set_result): Pass pointers to _M_do_set.

future (_State_baseV2::_M_set_result): Pass pointers to _M_do_set.

	* include/std/future (_State_baseV2::_M_set_result): Pass pointers to
	_M_do_set.
	(_State_baseV2::_M_do_set): Change parameters to pointers.
	(_State_baseV2::_Setter): Change _M_arg from reference to pointer.
	(_State_baseV2::__setter): Initialize _Setter with pointers.
	(_State_baseV2::__setter(promise<void>*)): Remove overload.
	(promise::set_value, promise::set_exception): Pass setter directly
	to _M_set_result.
	(_State_baseV2::_Task_setter): Add template parameter for callable
	type and replace std::function member with pointer to that type.
	Change _M_result member from reference to pointer.
	(_State_baseV2::_S_task_setter): Change parameter to lvalue reference
	and initialize _Task_setter with pointers.
	(__location_invariant): Specialize for _Setter and _Task_setter.

From-SVN: r213737