New HFS test image for 32-bit PowerPC

[John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>]

Hi!

Here is a new test image [1] which is supposed to test the proper partitioning
of the HFS boot partition and mounting it to /boot/grub.

Note: This image will *not* install GRUB yet properly. The purpose of this image
      is just to test whether the changes I made to the package partman-auto and
      the new packages hfsprogs-udeb and partman-hfs work correctly.

If everything works as intended, the partitioning program should automatically
create and format a GRUB boot partition and mount it to /boot/grub. If that's
the case, I can commit the changes to partman-auto and submit the new partman-hfs
package to unstable.

After that, I can work on the necessary changes to the grub-installer package which
conclude the changes necessary to fix the GRUB installation on Apple PowerMac.

Adrian

> [1] https://cdimage.debian.org/cdimage/ports/tests/hfstest-20210411/

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz@debian.org
`. `'   Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
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