all: fix "Invalid internal option" warning from make

Add "build.sh live-image" support for macppc.

Confirmed on qemu-9.2.0.

---
qemu-system-ppc -m 256 -machine mac99 -cpu g3 \
-drive file=NetBSD-10.99.12-macppc-live.img,media=disk,format=raw,if=none,id=disk0 \
-device ide-hd,bus=ide.0,drive=disk0 \
-netdev user,id=net0 -device e1000,netdev=net0 \
-nographic
>> =============================================================
>> OpenBIOS 1.1 [Sep 24 2024 19:56]
>> Configuration device id QEMU version 1 machine id 1
>> CPUs: 1
>> Memory: 256M
>> UUID: 00000000-0000-0000-0000-000000000000
>> CPU type PowerPC,750
milliseconds isn't unique.
Welcome to OpenBIOS v1.1 built on Sep 24 2024 19:56
Trying hd:,\\:tbxi...
Trying hd:,\ppc\bootinfo.txt...
Trying hd:,%BOOT...
>> Not a bootable ELF image
>> switching to new context:

OF_open bootpath=/pci@f2000000/mac-io@c/ata-3@20000/disk@0
read stage 2 blocks: 01234. done!
starting stage 2...

>> NetBSD/macppc OpenFirmware Boot, Revision 1.15 (Sun Feb 2 06:06:05 UTC 2025)
>> Open Firmware version 3.x
>> Open Firmware running in virtual-mode.
11891244+164812 [489184+466096]=0xc68ee8
start=0x100000
[ 1.0000000] Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
[ 1.0000000] 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013,
[ 1.0000000] 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023,
[ 1.0000000] 2024, 2025
[ 1.0000000] The NetBSD Foundation, Inc. All rights reserved.
[ 1.0000000] Copyright (c) 1982, 1986, 1989, 1991, 1993
[ 1.0000000] The Regents of the University of California. All rights reserved.

[ 1.0000000] NetBSD 10.99.12 (GENERIC) #0: Sun Feb 2 06:28:31 UTC 2025
[ 1.0000000] runner@fv-az1670-954:/home/runner/work/netbsd-src/netbsd-src/sys/arch/macppc/compile/obj.macppc/GENERIC
[ 1.0000000] total memory = 256 MB
[ 1.0000000] avail memory = 225 MB
[ 1.0000000] found openpic PIC at 80040000
[ 1.0000000] OpenPIC Version 1.2: Supports 1 CPUs and 64 interrupt sources.
[ 1.0000000] bootpath: /pci@f2000000/mac-io@c/ata-3@20000/disk@0:/netbsd
[ 1.0000000] mainbus0 (root)
[ 1.0000000] cpu0 at mainbus0: 750 (Revision 3.1), ID 0 (primary)
[ 1.0000000] cpu0: HID0 0x805000a4<EMCP,NAP,DPM,SGE,BTIC,BHT>, powersave: 1
[ 1.0000000] cpu0: 0.00 MHz L2 cache present but not enabled

:

[ 13.8062284] boot device: wd0
[ 13.8062284] root on wd0a dumps on wd0b
[ 13.8212139] root file system type: ffs
[ 13.8212139] entropy: best effort
[ 13.8212139] kern.module.path=/stand/macppc/10.99.12/modules
Sun Feb 2 10:28:53 UTC 2025
Starting root file system check:
/dev/rwd0a: file system is clean; not checking

:

Sun Feb 2 10:29:18 UTC 2025
Feb 2 10:29:19 getty[1181]: /dev/ttyE1: Device not configured

NetBSD/macppc (Amnesiac) (ttyZ0)

Feb 2 10:29:19 getty[1275]: /dev/ttyE3: Device not configured
login: Feb 2 10:29:19 getty[1055]: /dev/ttyE0: Device not configured
Feb 2 10:29:19 getty[1023]: /dev/ttyE2: Device not configured
---

Note -cpu g4 (default for -machine mac99) triggers qemu assertion:
---
:
Starting syslogd.
qemu: fatal: Raised an exception without defined vector 94

NIP fdb4d560 LR fdb4dd40 CTR fd61a308 XER 20000000 CPU#0
MSR 0200d032 HID0 809400a4 HF 02004012 iidx 0 didx 0

:
---

Fix typo in comment.

branches: 1.18.2;
Build macppc iso with TOOL_MKHYBRID via "iso-image" target in src/etc.

branches: 1.17.4;
While we do not yet have any 64bit kernels, do not build
floppy or CD images for installation.

branches: 1.16.68;
Change remaining instances of ${RELEASEDIR}/${MACHINES} to
${RELEASEDIR}/${RELEASEMACHINEDIR}

branches: 1.15.12; 1.15.16;
Add an iso_image target (iso-image as a target name doesn't play well with
bsd.subdirs.mk) in distrib/makefile, which builds an iso image for $MACHINE
with binary sets, stored in ${RELEASEDIR}/iso. The image is bootable for:
alpha, amd64, cats, i386, pmax, sgimips, sparc, sparc64, sun3, vax.
mac68k/macppc no there yet because of missing feature in makefs.

call iso_image in distrib/ for iso-image in the top Makefile.

branches: 1.14.16;
Install release files under "${RELEASEDIR}/${MACHINE}/..." instead of
"${RELEASEDIR}/...".

${RELEASEDIR} is never cleaned , and ${RELEASEDIR}/${MACHINE} is only
cleaned if UPDATE is not defined.

yet another distrib overhaul:
- move guts of distrib/Makefile.inc to distrib/common/Makefile.distrib
(fixes problem caused by implicit include of ../Makefile.inc in certain
submake conditions triggered by makefiles not yet in tree)
- removed mkdir of ${RELEASEDIR}/*; rely upon "snap_pre" target of
etc/Makefile to create all the release directories
- renamed RELINSTALL to RELEASE_INSTALL
- renamed FLOPPYINSTDIR to FLOPPY_RELEASEDIR
- renamed MDSETDIR to MDSET_RELEASEDIR
- removed ITARGET
- move release target from top level to appropriate subdirectory
- ensure release target has correct depends
- replace miniroot's IMAGE_MD_POST with common/Makefile.image IMAGEPOSTBUILD
- Makefile.image: add realall: ${IMAGE}

replace _SRC_TOP_ with NETBSDSRCDIR, since the latter is the "public" version

cleanup makefiles to NNDWO

use check_RELEASEDIR

don't set the owner or group when installing into $RELEASEDIR

${MAKE} print-objdir -> ${PRINTOBJDIR}

Install netbsd.GENERIC_MD instead of netbsd.ram.
(Why did we use netbsd.ram? It is only a temporary file...)

Need ${.CURDIR} for print-objdir

Use
${MAKE}
instead of
make

branches: 1.4.2;
Export boot.fs

branches: 1.3.2;
Install XCOFF ofwboot into installation area.

Add make release support so automake snapshots

Needed so that obj directories are created properly.