* include/Makefile.am: Add new header.
	* include/Makefile.in: Regenerate.
	* include/bits/allocated_ptr.h (__allocated_ptr, __allocate_guarded):
	New RAII utilities for working with allocators.
	* include/bits/shared_ptr_base.h (_Sp_counted_deleter): Define
	__allocator_type typedef and use new __allocated_ptr type.
	(_Sp_counted_ptr_inplace): Likewise.
	(__shared_count::__shared_count, __shared_ptr::__shared_ptr): Use
	__allocate_guarded to to simplify exception handling.
	* include/experimental/any (any::_Manager_alloc::_S_alloc): Likewise.
	* include/std/future (_Result_alloc::_M_destroy): Likewise.
	(_Result_alloc::_S_allocate_result): Likewise.
	* testsuite/20_util/shared_ptr/cons/43820_neg.cc: Adjust line number.
	* testsuite/20_util/shared_ptr/cons/void_neg.cc: Likewise.
	* testsuite/20_util/shared_ptr/creation/no_rtti.cc: New.
	* testsuite/20_util/shared_ptr/creation/alloc.cc: Test allocator
	with fancy pointer.
	* testsuite/30_threads/promise/cons/alloc.cc: Likewise.

From-SVN: r211996