* include/bits/std_mutex.h (mutex::native_handle)
	(lock_guard(mutex_type&, adopt_lock_t)
	(unique_lock(mutex_type&, adopt_lock_t): Add noexcept.
	* include/std/mutex (recursive_mutex, timed_mutex)
	(recursive_timed_mutex): Likewise.

From-SVN: r240980