[GHC] #7810: make show VALUE=VAR depends on ghc-stage1

[GHC]

#7810: make show VALUE=VAR depends on ghc-stage1
-------------------------------------+-------------------------------------
        Reporter:  kgardas           |                   Owner:  thomie
            Type:  bug               |                  Status:  closed
        Priority:  normal            |               Milestone:  7.12.1
       Component:  Build System      |                 Version:  7.7
      Resolution:  fixed             |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:  Phab:D1064
-------------------------------------+-------------------------------------
Changes (by thomie):

 * status:  new => closed
 * resolution:   => fixed


Comment:

 I added documentation to [wiki:Building/Modifying] as well as to `make
 help`.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7810#comment:9>
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