sm750 is seen as framebuffer-only device, so it's not marked with
master-of-seat tag with current udev (which does this mostly to
dri cards). But without master-of-seat device logind does not
report that the seat "CanGraphical", and thus sddm does not
work for it; there might be other problems, too.

This change adds udev rule that marks sm705's fb device as
master-of-seat.

We only plan to distribute XZ-compressed rootfs tarballs.

(mike@: merging cleaned-up version)

Tavolga seldom has a serial port connected, so it makes
more sense to write kernel and systemd's messages
to tty1.

We don't know the root UUID at this point; recovery.rc
will deal with it later, but we'd like to have
even the tarball in a somwhat working state.

...with xorg-drv-btsm750 and packaged xorg.conf.

aarch64 repo has got std-def/un-def flavours by now.

This commit fixes duplication of root device entry in /etc/fstab
and changes LABEL=ROOT entry with the proper one if found.

Apparently this didn't hurt qemu images much though...

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