valarray (~valarray): Use noexcept.

2011-06-14  Paolo Carlini  <paolo.carlini@oracle.com>

	* include/std/valarray (~valarray): Use noexcept.
	* include/bits/unique_ptr.h (~unique_ptr): Likewise.
	* testsuite/26_numerics/valarray/noexcept_move_construct.cc: New.
	* testsuite/20_util/shared_ptr/cons/noexcept_move_construct.cc:
	Likewise.
	* testsuite/20_util/unique_ptr/cons/noexcept_move_construct.cc:
	Likewise.
	* testsuite/20_util/weak_ptr/cons/noexcept_move_construct.cc:
	Likewise.

From-SVN: r175039