port-amd64/49558: NetBSD/amd64 release now contains no install media at all

[gson%gson.org@localhost (Andreas Gustafsson)]

>Number:         49558
>Category:       port-amd64
>Synopsis:       NetBSD/amd64 release now contains no install media at all
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    port-amd64-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Jan 12 17:15:00 +0000 2015
>Originator:     Andreas Gustafsson
>Release:        NetBSD-current, source date 2015.01.12.14.17.08
>Organization:
>Environment:
System: NetBSD
Architecture: x86_64
Machine: amd64
>Description:

Since yesterday, in amd64 releases built using "build.sh release",
release/amd64/installation/floppies no longer exists, and
release/amd64/installation/cdrom is empty.

Because there are no install floppies, the automated tests of amd64
on babylon5.netbsd.org are currently down.

Because there are no install ISOs, either, I am unable to fix this by
switching the test infrastructure to booting from CDROM.

It looks like the "build.sh iso-image" target is also failing to
produce an ISO (not that it would help me if it did, because the ISO
image it would produce if it worked does not support installing over
a serial console).

>How-To-Repeat:

Look the results from a recent amd64 daily build, e.g.,

  http://nyftp.netbsd.org/pub/NetBSD-daily/HEAD/201501121220Z/amd64/installation/

and see that it contains neither install floppies nor ISOs.

>Fix: