[GHC] #16215: Refactor getProgramContext in Hadrian

[GHC]

#16215: Refactor getProgramContext in Hadrian
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           Reporter:  mpickering     |             Owner:  (none)
               Type:  task           |            Status:  new
           Priority:  low            |         Milestone:
          Component:  Build System   |           Version:  8.6.3
  (Hadrian)                          |
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 All the calls to `getProgramContext` in Hadrian are immediately passed
 to `programPath` so to avoid confusion the two functions should probably
 be combined.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/16215>
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