Reinstall Lizard's isobuilders from scratch

Originally created by @bertagaz on #11006 (Redmine)

As noted in tails#10772 (comment 66546), our isobuilders have slight differences that may explain why we see sometimes different behaviors. When we’ll port our build system to Jessie, we then should reinstall then from scratch rather than simply upgrade them, to get a more deterministic behavior.

Parent Task: #12160 (closed)

Related issues

Blocked by tails#9262 (closed)

Edited May 15, 2020 by bertagaz

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