grunt payloads were successful on retry

Renaming since squawks and grunt passed with retries.  asuka continuing to fail

Duh, misspelling on asuka; retrying the regen.

original failures still pertain, however, despite success after retries.

For grunt, this seems to be the error (based on the failure date/time 1/11 23:00 PST)

https://luci-logdog.appspot.com/logs/chromeos/buildbucket/cr-buildbucket.appspot.com/8924574513965029600/+/steps/PaygenBuildCanary/0/stdout

23:46:30: INFO: Inserting payload and metadata signatures into /b/swarming/w/ir/cache/cbuild/repository/chroot/tmp/tmpoFGuJ2/delta.bin.signed.
23:46:30: INFO: RunCommand: cros_sdk -- delta_generator '--in_file=/tmp/tmpoFGuJ2/delta.bin' '--payload_signature_file=/tmp/tmpoFGuJ2/tmpYcSLQ8' '--metadata_signature_file=/tmp/tmpoFGuJ2/tmpAzmvNZ' '--out_file=/tmp/tmpoFGuJ2/delta.bin.signed' '--out_metadata_size_file=/tmp/tmpoFGuJ2/metadata_size.txt'
23:46:31: INFO: Saving metadata signatures in /b/swarming/w/ir/cache/cbuild/repository/chroot/tmp/tmpoFGuJ2/delta.bin.signed.metadata-signature.
23:46:32: INFO: Applying delta payload and verifying result
23:46:32: INFO: RunCommand: cros_sdk -- check_update_payload /tmp/tmpoFGuJ2/delta.bin.signed --check --type delta --disabled_tests move-same-src-dst-block --part_names kernel root --dst_part_paths /tmp/tmpoFGuJ2/new_kernel.dat /tmp/tmpoFGuJ2/new_root.dat --meta-sig /tmp/tmpoFGuJ2/delta.bin.signed.metadata-signature --metadata-size 630401 --src_part_paths /tmp/tmpoFGuJ2/old_kernel.dat /tmp/tmpoFGuJ2/old_root.dat
23:47:14: ERROR: Nonzero exit code (1), dumping command output:
puffin: error while loading shared libraries: libbrillo-core-456626.so: cannot open shared object file: No such file or directory
Traceback (most recent call last):

However, release builds have succeeded since then.
Renaming the bug to be specific to this issue.

Squawks has a completely different error: [1;31m06:27:04: ERROR: <class 'chromite.lib.cros_build_lib.RunCommandError'>: return code: 1; command: cros_sdk -- check_update_payload /tmp/tmppmKmnm/delta.bin --check --type delta --disabled_tests move-same-src-dst-block --part_names kernel root --dst_part_paths /tmp/tmppmKmnm/new_kernel.dat /tmp/tmppmKmnm/new_root.dat --metadata-size 0 --src_part_paths /tmp/tmppmKmnm/old_kernel.dat /tmp/tmppmKmnm/old_root.dat
Error: Unsupported minor version: 6

I filed  issue 921639  for that.  (No similar bugs appear to have been filed.)