[GHC] #11268: Extend ghc environment file features

[GHC]

#11268: Extend ghc environment file features
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        Reporter:  hvr               |                Owner:
            Type:  feature request   |               Status:  patch
        Priority:  highest           |            Milestone:  8.0.1
       Component:  Compiler          |              Version:
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D1668
       Wiki Page:                    |
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Changes (by hvr):

 * status:  new => patch


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11268#comment:1>
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