Add target_ops argument to to_extra_thread_info

Add target_ops argument to to_extra_thread_info

2014-02-19  Tom Tromey  <tromey@redhat.com>

	* target.h (struct target_ops) <to_extra_thread_info>: Add
	argument.
	(target_extra_thread_info): Add argument.
	* target.c (update_current_target): Update.
	* remote.c (remote_threads_extra_info): Add 'self' argument.
	* ravenscar-thread.c (ravenscar_extra_thread_info): Add 'self'
	argument.
	* nto-tdep.h (nto_extra_thread_info): Add 'self' argument.
	* nto-tdep.c (nto_extra_thread_info): Add 'self' argument.
	* linux-thread-db.c (thread_db_extra_thread_info): Add 'self'
	argument.
	* inf-ttrace.c (inf_ttrace_extra_thread_info): Add 'self'
	argument.
	* bsd-uthread.c (bsd_uthread_extra_thread_info): Add 'self'
	argument.
	* aix-thread.c (aix_thread_extra_thread_info): Add 'self'
	argument.