[non-stop] 01/10 Add "executing" property

[Eli Zaretskii]

> Date: Mon, 16 Jun 2008 22:53:54 -0700
> From: Joel Brobecker <brobecker@adacore.com>
> Cc: Pedro Alves <pedro@codesourcery.com>, gdb-patches@sourceware.org
> 
> I really like concise ChangeLogs because they tell me what files
> were modified as part of a change set, and also give me a very rough
> idea of what was done inside each file.

Well, "Makefile.in (foo): Update." doesn't give any idea WHAT was
done, it only says WHERE it was done.