guile: Raise default absolute timeout to from 2h to 20h.

Dependencies

• [2] HXS5NUHW hydra-eval-guile-jobs: Adjust to <license> objects.
• [3] SVDJSA6U hydra-eval-guile-jobs: Adjust to multiple-output format.
• [4] Y6H7Y3OT Capture the path to `guile', when available.
• [5] UL6TSQEA hydra-eval-guile-jobs: Use `--fresh-auto-compile'.
• [6] QMW24O5S Add support for Guile & Guix.

Change contents

• replacement in src/script/hydra-eval-guile-jobs.in at line 17
  [3.3183]→[2.0:60](∅→∅)
  − ;;; Copyright © 2012, 2013 Ludovic Courtès <ludo@gnu.org>
  [3.3183]

  [3.3239]
  + ;;; Copyright © 2012, 2013, 2014 Ludovic Courtès <ludo@gnu.org>
• replacement in src/script/hydra-eval-guile-jobs.in at line 118
  [3.7337]→[3.7337:7392](∅→∅)
  − 7200)))
  [3.7337]

  [3.7392]
  + 72000)))