PR breakpoints/8554.

Implement `save-breakpoints'.

	gdb/
	* breakpoint.c (save_cmdlist): New.
	(breakpoint_set_cmdlist, breakpoint_show_cmdlist): Moved up close
	to save_cmdlist.
	(print_recreate_catch_fork): New.
	(catch_fork_breakpoint_ops): Install it.
	(print_recreate_catch_vfork): New.
	(catch_vfork_breakpoint_ops): Install it.
	(print_recreate_catch_syscall): New.
	(catch_syscall_breakpoint_ops): Install it.
	(print_recreate_catch_exec): New.
	(catch_exec_breakpoint_ops): Install it.
	(print_recreate_exception_catchpoint): New.
	(gnu_v3_exception_catchpoint_ops): Install it.
	(save_breakpoints): New, based on tracepoint_save_command, but
	handle all breakpoint types.
	(save_breakpoints_command): New.
	(tracepoint_save_command): Rename to...
	(save_tracepoints_command): ... this, and reimplement using
	save_breakpoints.
	(save_command): New.
	(_initialize_breakpoints): Install the "save" command prefix.
	Install the "save breakpoints" command.  Make "save-tracepoints" a
	deprecated alias for "save tracepoints".
	* breakpoint.h (struct breakpoint_ops): New field `print_recreate'.
	* ada-lang.c (print_recreate_exception): New.
	(print_recreate_catch_exception): New.
	(catch_exception_breakpoint_ops): Install it.
	(print_recreate_catch_exception_unhandled): New.
	(catch_exception_unhandled_breakpoint_ops): Install it.
	(print_recreate_catch_assert): New.
	(catch_assert_breakpoint_ops): Install it.

	* NEWS: Mention the new `save breakpoints' command.  Mention the
	new `save tracepoints' alias and that `save-tracepoints' is now
	deprecated.

	gdb/doc/
	* gdb.texinfo (Save Breakpoints): New node.
	(save-tracepoints): Rename to ...
	(save tracepoints): ... this.  Mention that `save-tracepoints' is
	a deprecated alias to `save tracepoints'.

	gdb/testsuite/
	* gdb.trace/save-trace.exp: Adjust.

gdb/breakpoint.h

@@ -362,6 +362,9 @@ struct breakpoint_ops
   /* Display information about this breakpoint after setting it (roughly
      speaking; this is called from "mention").  */
   void (*print_mention) (struct breakpoint *);
+
+  /* Print to FP the CLI command that recreates this breakpoint.  */
+  void (*print_recreate) (struct breakpoint *, struct ui_file *fp);
 };
 
 enum watchpoint_triggered