* include/bits/ptr_traits.h (__rebind): Replace with...
	(rebind): Implement using alias-declaration.
	* include/ext/pointer.h (__rebind): Replace with...
	(rebind): Implement using alias-declaration.
	* include/bits/alloc_traits.h (__rebind_alloc, __rebind_traits):
	Replace with...
	(rebind_alloc, rebind_traits): Implement using alias-declaration.
	* include/ext/alloc_traits.h (rebind): Use rebind_alloc instead of
	__rebind_alloc.
	* include/std/scoped_allocator (rebind): Likewise.

From-SVN: r181139