re PR libstdc++/53657 ([C++11] pair(pair&&) move constructor is non-trivial)

re PR libstdc++/53657 ([C++11] pair(pair&&) move constructor is non-trivial)

2012-07-13  Paolo Carlini  <paolo.carlini@oracle.com>

	PR libstdc++/53657
	* include/bits/stl_pair.h (pair<>::pair(pair&&)): Declare defaulted,
	per C++11.
	* include/bits/stl_map.h (map<>::insert(_Pair&&), map<>::insert
	(const_iterator, _Pair&&)): Constrain with std::is_constructible,
	per LWG2005.
	* include/bits/stl_multimap.h (multimap<>::insert(_Pair&&),
	multimap<>::insert(const_iterator, _Pair&&)): Likewise.
	* include/bits/hashtable_policy.h (_Insert<>::insert(_Pair&&),
	_Insert<>::insert(const_iterator, _Pair&&)): Likewise.
	* include/debug/unordered_map: Adjust.
	* include/debug/map.h: Likewise.
	* include/debug/multimap.h: Likewise.
	* include/profile/unordered_map: Likewise.
	* include/profile/map.h: Likewise.
	* include/profile/multimap.h: Likewise.

From-SVN: r189456