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

[Joel Brobecker]

> > 	* Makefile.in (event-top.o, frame.o, inf-loop.o, top.o):
> > 	Update.
> 
> I think you should tell what prerequisites were added to each target.
> A simple "update" will never reveal when a prerequisite was added, if
> someone will ever want to know.

I can only speak for myself, but in my few years of GDB development,
I have never missed having the exact dependencies in the ChangeLog.
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.  When the ChangeLog becomes
too verbose, it becomes more difficult for me to use them.

-- 
Joel