[GHC] #9606: Improve outdated ghc-pkg cache warning

[GHC]

#9606: Improve outdated ghc-pkg cache warning
-------------------------------------+-------------------------------------
        Reporter:  nh2               |                   Owner:
            Type:  bug               |                  Status:  patch
        Priority:  normal            |               Milestone:  7.12.1
       Component:  ghc-pkg           |                 Version:  7.8.2
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:  Phab:D658
-------------------------------------+-------------------------------------
Changes (by thomie):

 * status:  new => patch
 * differential:   => Phab:D658


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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9606#comment:3>
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