* ui-out.h (ui_out_table_header): Add parameter ``col_name''.

* ui-out.h (ui_out_table_header): Add parameter ``col_name''.
(table_header_ftype): Ditto.
* cli-out.c (cli_table_header): Update.
* ui-out.c (ui_out_table_header): Update.
(uo_table_header): Update.
(default_table_header): Update.
(append_header_to_list): Update.
(struct ui_out_header): Add field ``col_name''.
(append_header_to_list): Use xstrdup.  Initialize col_name.
* breakpoint.c (breakpoint_1): Pass COL_NAME to
ui_out_table_header.