* breakpoint.h (struct bp_location): Add section.

	* breakpoint.h (struct bp_location): Add section.
	(struct breakpoint): Remove section.
	* breakpoint.c (insert_breakpoints, remove_breakpoint)
	(breakpoint_here_p, breakpoint_inserted_here_p)
	(breakpoint_thread_match, bpstat_stop_status, print_one_breakpoint)
	(describe_other_breakpoints, check_duplicates, set_raw_breakpoint)
	(clear_command, delete_breakpoint, breakpoint_re_set_one): Access
	section through loc.