[RFC] Autoload-breakpoints new version [7/9] autoload breakpoint sync function

This patch add the sync function to autoload-breakpoints.  All this function is depend on the notification
(include the extend that prev patch add).

Following is a introduce of sync process:
1) When the remote target wants to send a sync packet to GDB, it will send a notification to GDB.
2) GDB handle_notification will get this packet.  Handler will get the status of GDB from argument flags. 
When GDB in NOTIFICATION_ASYNC and NOTIFICATION_RECV_FOREVER, handle this packet because change the
breakpoints will not affect anything.
If GDB is in other status, the breakpoints cannot be changed because GDB just want to change them with
itself.  So just drop this packet.
3) In the remote target part, after it send the notification.  It will wait
the reply packet from GDB.
If the packet is the notification packet, handle it as the reply from GDB.
If not, the packet that sent to GDB is dropped.  Then the target need handle this packet as it is.

Thanks,
Hui

2012-08-07  Hui Zhu  <hui_zhu <at> mentor.com>

	* breakpoint.c (breakpoint_add_command_line_next): New variable.
	(breakpoint_add_command_line, breakpoint_add_command,
	handle_autoload_breakpoint_cmd_to_breakpoints,
	parse_autoload_breakpoint_definition_to_breakpoints): New function.
	* remote.c (inside_autoload_breakpoint_handler): New variable.
	(handle_notification): Handle QBDP packet.
	(remote_insert_breakpoint, remote_remove_breakpoint,
	remote_insert_hw_breakpoint, remote_remove_hw_breakpoint): Check
	inside_autoload_breakpoint_handler.