port-evbarm/60119: evbarm-earmv7hf build fails on Linux host

["Andreas Gustafsson via gnats" <gnats-admin%NetBSD.org@localhost>]

>Number:         60119
>Category:       port-evbarm
>Synopsis:       evbarm-earmv7hf build fails on Linux host
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    port-evbarm-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Mar 22 16:20:00 +0000 2026
>Originator:     Andreas Gustafsson
>Release:        NetBSD-current, source date >= 2026.02.15.21.07.36
>Organization:
  
>Environment:
System: NetBSD
Architecture: earmv7hf
Machine: evbarm
>Description:

Building NetBSD-current/evbarm-earmv7hf on a Debian 12 host fails with
the error message:

   src/distrib/utils/embedded/mkimage: 49: set: Illegal option -o pipefail

since this commit:

   2026.02.15.21.07.36 riastradh src/distrib/utils/embedded/mkimage 1.94

For logs, see:

  https://www.gson.org/netbsd/bugs/build/evbarm-earmv7hf/commits-2026.02.html#2026.02.15.21.07.36

This is using the stock Debian /bin/sh which is a symlink to dash.

>How-To-Repeat:

>Fix: