Comment 9 for bug 1645906

Ah, for precise the key signing date was wrong. Tried it again with the same results.

(precise2-amd64)root@impulse:/home/bdmurray/source-trees/ubuntu-archive-tools/upstream# gpg --list-packets /tmp/update-manager-TEgnXk/trusty.tar.gz.gpg
:signature packet: algo 17, keyid 40976EAF437D05B5
        version 4, created 1480546800, md5len 0, sigclass 0x00
        digest algo 2, begin of digest 3b 37
        hashed subpkt 2 len 4 (sig created 2016-11-30)
        subpkt 16 len 8 (issuer key ID 40976EAF437D05B5)
        data: [158 bits]
        data: [159 bits]