Force usage with python2
authorMichael Prokop <mika@grml.org>
Thu, 28 Feb 2019 14:49:19 +0000 (15:49 +0100)
committerMichael Prokop <mika@grml.org>
Thu, 28 Feb 2019 14:54:39 +0000 (15:54 +0100)
grml2usb isn't py3k-ready yet, so until we're there
ensure we don't run under python3, even by accident.

Closes: #921327


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