memory: Include auto_ptr.h later.

memory: Include auto_ptr.h later.

	* include/std/memory: Include auto_ptr.h later.
	* include/bits/shared_ptr.h (shared_ptr(auto_ptr<_Up>&&): Remove
	definition.
	* include/bits/shared_ptr_base.h (__shared_ptr(auto_ptr<_Up>&&):
	Likewise.
	* include/bits/unique_ptr.h (unique_ptr(auto_ptr<_Up>&&): Likewise.
	* include/backward/auto_ptr.h (unique_ptr(auto_ptr<_Up>&&): Define.
	(shared_ptr(auto_ptr<_Up>&&, __shared_ptr(auto_ptr<_Up>&&): Likewise.
	* include/std/future: Reduce header dependencies.
	* testsuite/20_util/default_delete/48631_neg.cc: Adjust dg-error line
	numbers.
	* testsuite/20_util/shared_ptr/cons/43820_neg.cc: Likewise.
	* testsuite/20_util/unique_ptr/assign/48635_neg.cc: Likewise.

From-SVN: r190109