[RFA] Make cu/tu functions in dwarf.exp take a list of options

[Doug Evans]

On Sun, May 19, 2013 at 10:40 PM, Joel Brobecker <brobecker@adacore.com> wrote:
>> When you change the calling sequence of a function in a simple fashion,
>> and you change all the callers of the function to use the new calling
>> sequence, there is no need to make individual entries for all the
>> callers that you changed.  Just write in the entry for the function
>> being called, ``All callers changed''---like this:
>
> FWIW: No real opinion, but I intepreted the above in the context
> of the same file only. I find that listing all the files adjusted
> was fairly easy, so I thought the added information was worth the
> small effort...

"small" can be relative, and we shouldn't IMO be adding effort to
writing ChangeLogs that have incommensurate value.

[For example, we go *way* beyond what is required by standards.texi
for doc ChangeLogs.]