re PR libstdc++/36962 ([C++0x] Add constructors / assignment operators from unique_ptr to shared_ptr)

	PR libstdc++/36962
	* include/Makefile.am: Update headers.
	* include/Makefile.in: Regenerate.
	* include/std/memory: Update headers.
	* include/tr1/memory: Likewise.
	* include/tr1_impl/boost_shared_ptr.h: Remove, splitting into
	separate implementations for std and tr1.
	* include/bits/boost_sp_shared_count.h: Remove.
	* include/tr1/boost_sp_shared_count.h: Remove.
	* include/bits/shared_ptr.h: New. Combines boost_sp_shared_count.h
	and boost_shared_ptr.h into one file.
	(__shared_count,__shared_ptr,shared_ptr,swap): Add unique_ptr
	and rvalue-reference support as per current WP.
	* include/tr1/shared_ptr.h: New. Combines boost_sp_shared_count.h
	and boost_shared_ptr.h into one file.
	* testsuite/20_util/shared_ptr/cons/unique_ptr.cc: New.
	* testsuite/20_util/shared_ptr/cons/unique_ptr_deleter.cc: New.
	* testsuite/20_util/shared_ptr/cons/unique_ptr_deleter_ref.cc: New.
	* testsuite/20_util/shared_ptr/cons/unique_ptr_neg.cc: New.
	* testsuite/20_util/shared_ptr/assign/auto_ptr_rvalue.cc: New.
	* testsuite/20_util/shared_ptr/assign/unique_ptr_lvalue_neg.cc: New.
	* testsuite/20_util/shared_ptr/assign/unique_ptr_rvalue.cc: New.
	* testsuite/20_util/shared_ptr/modifiers/swap_rvalue.cc: New.
	* testsuite/20_util/shared_ptr/assign/auto_ptr_rvalue_neg.cc: Remove.

From-SVN: r140012