[GHC] #16264: Install reqlib'd libraries during CI

[GHC]

#16264: Install reqlib'd libraries during CI
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        Reporter:  bgamari           |                Owner:  bgamari
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Continuous        |              Version:  8.6.3
  Integration                        |
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by harpocrates):

 * cc: harpocrates (added)


Comment:

 Could we put this logic somewhere in Hadrian? It would be nice to be able
 to use the same logic locally too. Also, has worked on this started yet
 (asking to see if maybe I should just go for it)?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16264#comment:2>
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