* breakpoint.h (set_longjmp_breakpoint): Add THREAD argument.

	* breakpoint.h (set_longjmp_breakpoint): Add THREAD argument.
	(enum bptype): Add bp_longjmp_master.

	* breakpoint.c (create_longjmp_master_breakpoint): New function.
	(update_breakpoints_after_exec): Handle bp_longjmp_master
	breakpoints.  Call create_longjmp_master_breakpoint.
	(print_it_typical, bpstat_stop_status, bpstat_what,
	print_one_breakpoint_location, allocate_bp_location, mention,
	delete_command, breakpoint_re_set_one): Handle bp_longjmp_master.
	(breakpoint_re_set): Call create_longjmp_master_breakpoint.
	(create_longjmp_breakpoint): Delete.
	(set_longjmp_breakpoint): Add THREAD argument.  Reimplement
	to install momentary clones of bp_longjmp_master breakpoints.

	* infcmd.c (step_1): Pass thread to set_longjmp_breakpoint.