[committed] exec-stack warning for test which wants executable stacks

[Jeff Law]

On 4/25/2022 6:56 AM, Martin Liška wrote:
>
>> I used -z execstack rather than --no-warn-execstack as the former is recognized by older versions of ld, but the latter is a new option.
> Thanks for it.
Unfortunately, I should have looked at the other failures that have 
popped up over the last week.  Essentially all the nested function tests 
are failing on some targets due to the same linker warning.

Either pruning or adding  the option to all those tests is going to be 
necessary ;(

jeff