Print an error and exit if a host package (dependency) is missing even with chroot build, fix binary_onie dependencies and add Suggests

@hertzog I hope it's OK to add the suggests, it follow the same model as other scripts (eg: parted).

I found out the hard way that the script won't error out if there's a missing (host) dependency and it's doing a chroot build, so I'd propose this change to make it error out with a clear message. Do you see any drawbacks?

I don't see any drawback.

I would put the missing dependencies in Recommends instead of Suggests as they are needed for the onie script to work (even if the target is optional). cpio and apt-utils are other "host dependencies" and they are in Recommends after all.

It's not like those are big dependencies so we are not imposing any significant extra cost. "coreutils" is "Essential: yes" so should probably be dropped however.

Feel free to merge your changes after having taken into account my remarks.

added 3 commits

• a0335ac4 - ONIE: add Recommends for programs needed by binary_onie
• 050e637b - ONIE: do not use package cache, only runs on host
• 08dd0b90 - Print an error and exit if a host package (dependency) is missing.

Compare with previous version

merged

ACK, thanks!