Before this change, we could have 0 exit code from the main
make process even when some targets failed to build on some
architectures:

$ make ARCH=mipsel [...] vm/tavolga-regular-mate-ex.recovery.tar
** ARCH: mipsel
10:15:06 cleaning up
10:15:06 initializing BUILDDIR: build/
10:15:06 preparing distro config: build/distcfg.mk
make[1]: *** No rule to make target 'use/systemd-coredump', needed by 'profile/.extra'.  Stop.
[nightly-mipsel@loongson5 mkimage-profiles]$ echo $?
0

Use `make -k' to get the old behaviour.

- recovery.tar support (iv@)
- mixin/mixin deps, aarch64 EFI, mcom02 & jetson nano support,
  multikernel & portability fixes, refactoring & cleanups (antohami@)
- document STAGE1_MODLISTS (me)

This fixes warning at enlightenment startup.

...to extend the supported protocols list as suggested.

See-also: b869d365f195a7070f1f6c425795b4c058b18c6c

...to make it easier for all builds including nm-applet
to add this target.

Suggested-by: Isaac Newton
See-also: http://sdelanounas.ru/blogs/123886/?pid=1156605#comments

This was highly inobvious, and should have been documented
within the very same commit adding the variable!

See-also: https://bugzilla.altlinux.org/30239
See-also: https://bugzilla.altlinux.org/32171

The problem at hand is that different kernels can have
varying module sets, and it makes sense to put four of
those at once sometimes; so avoid silly build breakage.

Use engineering lists instead.

Lists contain software for engineers by category.
This is a replacement for desktop+engineering list.

xorg-drv-fbturbo is recommended by ELVIS and supports working
with the proprietary mali driver.

tavolga-image-tool contains helpers for building images
for Tavolga Terminal; doing that on other platforms
is highly unlikely (x86 means qemu host, of course).

recovery.tar needed for tavolga (mipsel).
This commit is the result of transferring the required functionality
from build-mr (mipsel rootfs).
This change uses external tool to build Tavolga-compatible
recovery.tar. This simplifies the logic and avoids having
recovery workdir in the profile.
After this change, m-p will require tavolga-image-tools >= 3.0.

These were clearly missing!

cinnamon-regular package doesn't pull thunderbird in anymore,
so drop the l10n package too.

Looks like the initial empirical rule "mixin must not depend
on another mixin" is too restrictive for practical purposes
given enough image targets multiplied by enough platforms;
let's declare it obsolete and see what follows.

This reverts commit 147964b0.
installer-feature-create-ghost-directories not needed more.
See-also: https://bugzilla.altlinux.org/show_bug.cgi?id=37171

Not all systemd-based images need these settings,
so don't change +systemd alias.

See-also: https://lists.altlinux.org/pipermail/devel-distro/2019-July/001710.html

The builder-useradd package installs components of ALT build
environment into the system, namely gear, hasher, and git-core
required for those to work.

See commit 207cec89c4515fefa2b711acd06c645ed3bd0ee8.

KFLAVOURS can describe more than one kernel, get iterator back.

Fixes: 27674e29

- ppc64le support (glebfm@)
- build-vm hacked to build tarballs too (iv@ et al)
- p8.mk: dropped; along with other cleanups/fixups (antohami)

It was misleading already, and riscv64 is going to join the gang
(but not there yet) following aarch64, mipsel, ppc64le and more
e2k* subarches...

I've just borrowed glebfm@'s one introduced by commit
ec23a8ec before; this
still might be improved it seems.
Suggested-by: Gleb Fotengauer-Malinovskiy <glebfm@altlinux.org>