Comment 14 for bug 1452016

After one more iteration testing is good on arm, s390x and power (as well as regression checks on x86).
So I pushed the commits for review and acceptance.

I needed no changes in debian/* (other than debian/changelog).
As discussed I propose against upstream but I'll add a suggested changelog content as commit message.

Proposal at: https://code.launchpad.net/~paelzer/uvtool/+git/uvtool/+merge/332412