Add target_ops argument to to_record_is_replaying

Add target_ops argument to to_record_is_replaying

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

	* target.h (struct target_ops) <to_record_is_replaying>: Add
	argument.
	* target.c (target_record_is_replaying): Add argument.
	* record-full.c (record_full_is_replaying): Add 'self' argument.
	* record-btrace.c (record_btrace_is_replaying): Add 'self'
	argument.
	(record_btrace_xfer_partial, record_btrace_store_registers)
	(record_btrace_prepare_to_store, record_btrace_resume)
	(record_btrace_wait, record_btrace_decr_pc_after_break)
	(record_btrace_find_new_threads, record_btrace_thread_alive):
	Update.