Fix broken build.x86_64-linux job (#573)

Dependencies

• [2] 5MP35ORV hydra-eval-jobs: Ugly hackery to reduce memory usage
• [3] 4N5APGRG * Start of a helper tool to evaluate job expressions efficiently.
• [4] 4LWGZL33

Change contents

• replacement in src/hydra-eval-jobs/hydra-eval-jobs.cc at line 278
  [2.2904]→[2.2904:2954](∅→∅)
  − evalSettings.restrictEval = true;
  [2.2904]

  [3.1021]
  + settings.restrictEval = true;