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

[Hans-Peter Nilsson]

> From: Hans-Peter Nilsson <Hans-Peter.Nilsson@axis.com>
> Date: Thu, 26 May 2022 03:17:01 +0200

Regarding setting the default for the RWX-segment warning
per-target:

> How about the usual method, a line in the ld emulparams
> file for the target?

JFTR: no extra infrastructure bits needed.  I found the
right spot, just a trivial clause in ld/configure.tgt.

brgds, H-P