[MacPorts] #56395: buildbot: Install asciidoctor in jobstoolsprefix for jobs-guide

[MacPorts]

#56395: buildbot: Install asciidoctor in jobstoolsprefix for jobs-guide
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  Reporter:  raimue         |      Owner:  ryandesign
      Type:  enhancement    |     Status:  assigned
  Priority:  Normal         |  Milestone:
 Component:  buildbot/mpbb  |    Version:
Resolution:                 |   Keywords:
      Port:                 |
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Comment (by ryandesign):

 I guess asciidoc is still used for generating the manpages. So we need
 both.

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Ticket URL: <https://trac.macports.org/ticket/56395#comment:2>
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