Fix dracut Debian/Ubuntu packaging

[loli10K]

Motivation and Context

Fix #8990

I expected the Debian/Ubuntu builders to detect this kind of issue, this needs more debugging.

Description

zfs-dracut package is "noarch" since ca4e5a7, alien(1) needs to know this to properly convert the dracut rpm.

To prevent future regression the make targets running alien to convert rpm->deb will now fail the build if they can't convert even a single file:

Putting child 0x5632c24cc770 (deb-utils) PID 12124 on the chain.
Live child 0x5632c24cc770 (deb-utils) PID 12124 
zfs_0.8.0-106_amd64.deb generated
libnvpair1_0.8.0-106_amd64.deb generated
libuutil1_0.8.0-106_amd64.deb generated
libzfs2_0.8.0-106_amd64.deb generated
libzpool2_0.8.0-106_amd64.deb generated
libzfs2-devel_0.8.0-106_amd64.deb generated
zfs-test_0.8.0-106_amd64.deb generated
zfs-dracut_0.8.0-106_amd64.deb generated
File "zfs-initramfs-0.8.0-106_gdf358db7c.x86_64.rpm" not found.
Reaping losing child 0x5632c24cc770 PID 12124 
Makefile:1381: recipe for target 'deb-utils' failed
make: *** [deb-utils] Error 1
Removing child 0x5632c24cc770 PID 12124 from chain.

How Has This Been Tested?

Tested on my local Debian builder, also with --disable-pyzfs:

...
fakeroot alien --bump=0 --scripts --to-deb --target=$debarch \
    $pkg1 $pkg2 $pkg3 $pkg4 $pkg5 $pkg6 $pkg7 \
    $pkg8 $pkg9 $pkg10 || exit 1; \
rm -f ${path_prepend}/dh_shlibdeps; \
rmdir ${path_prepend}; \
rm -f $pkg1 $pkg2 $pkg3 $pkg4 $pkg5 $pkg6 $pkg7 \
    $pkg8 $pkg9 $pkg10;
Putting child 0x562259f28e00 (deb-utils) PID 15890 on the chain.
Live child 0x562259f28e00 (deb-utils) PID 15890 
ls: cannot access 'python*-pyzfs-0.8.0-112_g67af199fb*': No such file or directory
zfs_0.8.0-112_amd64.deb generated
libnvpair1_0.8.0-112_amd64.deb generated
libuutil1_0.8.0-112_amd64.deb generated
libzfs2_0.8.0-112_amd64.deb generated
libzpool2_0.8.0-112_amd64.deb generated
libzfs2-devel_0.8.0-112_amd64.deb generated
zfs-test_0.8.0-112_amd64.deb generated
zfs-dracut_0.8.0-112_amd64.deb generated
zfs-initramfs_0.8.0-112_amd64.deb generated
Reaping winning child 0x562259f28e00 PID 15890 
Removing child 0x562259f28e00 PID 15890 from chain.
Successfully remade target file 'deb-utils'.
root@linux:/usr/src/zfs# echo $?
0
root@linux:/usr/src/zfs# head config.log 
This file contains any messages produced by compilers while
running configure, to aid debugging if configure makes a mistake.

It was created by zfs configure 0.8.0, which was
generated by GNU Autoconf 2.69.  Invocation command line was

  $ ./configure --with-config=user --disable-pyzfs

## --------- ##
## Platform. ##

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Performance enhancement (non-breaking change which improves efficiency)
• Code cleanup (non-breaking change which makes code smaller or more readable)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation (a change to man pages or other documentation)

Checklist:

• My code follows the ZFS on Linux code style requirements.
• I have updated the documentation accordingly.
• I have read the contributing document.
• I have added tests to cover my changes.
• All new and existing tests passed.
• All commit messages are properly formatted and contain Signed-off-by.

[codecov]

Codecov Report

Merging #8991 into master will decrease coverage by 0.05%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #8991      +/-   ##
==========================================
- Coverage   78.68%   78.62%   -0.06%     
==========================================
  Files         388      388              
  Lines      119958   119958              
==========================================
- Hits        94390    94319      -71     
- Misses      25568    25639      +71

Flag	Coverage Δ
#kernel	79.42% <ø> (-0.03%)	⬇️
#user	66.11% <ø> (-0.41%)	⬇️

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[behlendorf]

Thanks!

[ofaaland]

LGTM. Thanks for the fix.