[GHC] #9836: Facility to mitigate double-breakage due to Data.Version.versionTag Deprecation

[GHC]

#9836: Facility to mitigate double-breakage due to Data.Version.versionTag
Deprecation
-------------------------------------+-------------------------------------
       Reporter:  hvr                |                   Owner:
           Type:  task               |                  Status:  new
       Priority:  high               |               Milestone:  7.10.1
      Component:  libraries/base     |                 Version:
       Keywords:  Data.Version       |        Operating System:
   Architecture:  Unknown/Multiple   |  Unknown/Multiple
     Difficulty:  Easy (less than 1  |         Type of failure:
  hour)                              |  None/Unknown
     Blocked By:                     |               Test Case:
Related Tickets:  #2496              |                Blocking:
                                     |  Differential Revisions:
-------------------------------------+-------------------------------------
 See https://groups.google.com/forum/#!topic/haskell-core-libraries/q9H-
 QlL_gnE

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9836>
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