[GHC] #8767: Add rules involving `coerce` to the libraries

[GHC]

#8767: Add rules involving `coerce` to the libraries
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        Reporter:  nomeata           |            Owner:
            Type:  task              |           Status:  new
        Priority:  normal            |        Milestone:
       Component:  libraries/base    |          Version:  7.9
      Resolution:                    |         Keywords:
Operating System:  Unknown/Multiple  |     Architecture:  Unknown/Multiple
 Type of failure:  None/Unknown      |       Difficulty:  Unknown
       Test Case:                    |       Blocked By:  8718
        Blocking:                    |  Related Tickets:  #2110
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Comment (by Austin Seipp <austin@…>):

 In [changeset:"f96dc5470355ce52741c717b6387d7f61b6a8dc1/base"]:
 {{{
 #!CommitTicketReference repository="base"
 revision="f96dc5470355ce52741c717b6387d7f61b6a8dc1"
 Add RULE for "map coerce = map" (#8767)

 Signed-off-by: Austin Seipp <austin at well-typed.com>
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8767#comment:1>
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