* config/vxlib-tls.c (active_tls_threads): Delete.
	(delete_hook_installed): New.
	(tls_delete_hook): Don't delete the delete hook.
	(tls_destructor): Delete it here.
	(__gthread_set_specific): Adjust installing the delete hook.
	(tls_delete_hook): Use __gthread_enter_tsd_dtor_context and
	__gthread_leave_tsd_dtor_context.

From-SVN: r146641