[GHC] #12517: Simplify runghc command line options

[GHC]

#12517: Simplify runghc command line options
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        Reporter:  harendra          |                Owner:  harendra
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.2.1
       Component:  None              |              Version:  8.0.1
      Resolution:                    |             Keywords:  runghc
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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Comment (by bgamari):

 > Let me try. I will need a reviewer. I guess all we need to do for now is
 - add deprecation warnings for what is to be removed in future and remove
 it from the documentation. The deprecation warnings will show on stderr.
 Later, at some point in time we will remove the unsupported ways/flags of
 invoking runghc.

 Sounds reasonable to me. I'll gladly review.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12517#comment:12>
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