[GHC] #8787: compiler/ghc.mk: restore GhcHcOpts variable handling

[GHC]

#8787: compiler/ghc.mk: restore GhcHcOpts variable handling
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        Reporter:  slyfox            |            Owner:  thoughtpolice
            Type:  bug               |           Status:  new
        Priority:  high              |        Milestone:  7.10.1
       Component:  Compiler          |          Version:  7.6.3
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:
        Blocking:                    |  Related Tickets:
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Changes (by simonmar):

 * owner:   => thoughtpolice
 * priority:  normal => high
 * milestone:   => 7.10.1


Comment:

 Interesting, that hasn't worked for quite some time.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8787#comment:1>
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