all: fix "Invalid internal option" warning from make

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

Confirmed on qemu-9.2.0 (with pkgsrc patch-hw_rtc_mc146818rtc.c).

---
qemu-system-alpha -m 1024 -machine clipper \
-drive file=NetBSD-10.99.12-alpha-live.img,media=disk,format=raw,if=none,id=disk0 \
-device ide-hd,bus=ide.0,drive=disk0 \
-netdev user,id=net0 -device tulip,netdev=net0 \
-nographic -kernel netbsd-GENERIC -append root=wd0
PCI: 0:1:0 class 0300 id 1013:00b8
PCI: region 0 (BAR 10): 10000000
PCI: region 1 (BAR 14): 12000000
PCI: 0:2:0 class 0101 id 1095:0646
PCI: region 0 (BAR 10): 0000c000
PCI: region 1 (BAR 14): 0000c008
PCI: region 2 (BAR 18): 0000c010
PCI: region 3 (BAR 1c): 0000c018
PCI: region 4 (BAR 20): 0000c020
PCI: intr pin 1 -> irq 12
PCI: 0:3:0 class 0200 id 1011:0019
PCI: region 0 (BAR 10): 0000c080
PCI: region 1 (BAR 14): 12001000
PCI: intr pin 1 -> irq 16
PCI: 0:7:0 class 0601 id 8086:0484
[ 1.0000000] [ Kernel symbol table missing! ]
[ 1.0000000] consinit: not using prom console
[ 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: Thu Jan 30 16:13:51 UTC 2025
[ 1.0000000] mkrepro@mkrepro.NetBSD.org:/usr/src/sys/arch/alpha/compile/GENERIC
[ 1.0000000] AlphaServer ES40 ("Clipper"), 250MHz, s/n QEMU
[ 1.0000000] 8192 byte page size, 1 processor.
[ 1.0000000] total memory = 1024 MB
[ 1.0000000] (120 KB reserved for PROM, 1023 MB used by NetBSD)
[ 1.0000000] avail memory = 996 MB
[ 1.0000000] mainbus0 (root)
[ 1.0000000] cpu0 at mainbus0: ID 0 (primary), 21264A-0 (EV67)
[ 1.0000000] cpu0: Architecture extensions: 0x1307<PMI,PAT,MVI,CIX,FIX,BWX>
[ 1.0000000] qemu0 at mainbus0: Qemu virtual machine services

:

[ 7.2872719] root on wd0a dumps on wd0b
[ 7.2872719] root file system type: ffs
[ 7.3086672] kern.module.path=/stand/alpha/10.99.12/modules
Sun Feb 2 19:56:48 UTC 2025

:
---

branches: 1.23.74;
Change remaining instances of ${RELEASEDIR}/${MACHINES} to
${RELEASEDIR}/${RELEASEMACHINEDIR}

branches: 1.22.12; 1.22.16;
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: 1.21.16;
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}

convert to building with NDWO Makefile.tarfloppy.

alpha is now fully NDWO (well, at least, the stuff that's enabled in
distrib/alpha/Makefile)

convert instkernel/fdset into using NDWO Makefile.tarfloppy, which
allows UNPRIVED cross building of aforementioned directory

Use the correct name of the INSTALL kernel.

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

use RELINSTALL from ../Makefile.inc

whitespace tweak

use check_RELEASEDIR, and minor whitespace cleanup

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

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

Need ${.CURDIR} for README.files (required when using MAKEOBJDIRPREFIX).

Find a bunch of places where we call "make" and replace it with ${MAKE}

${.CURDIR} is not optional when using MAKEOBJDIRPREFIX.

Use
${MAKE}
instead of
make

branches: 1.6.4;
Fix typo.

Include bsd.own.mk so we use /etc/mk.conf, which may well have RELEASEDIR
in it.

Don't assume anything about how obj dirs are named.

branches: 1.3.4;
GENERIC doesn't fit on one floppy anymore. For now, disable the target.

Add release targets, intended for use by the src/etc/Makefile `make release'.

branches: 1.1.2;
Someday we might really traverse in distrib; at least traverse this
subdirectory now.