[GHC] #15915: Add CI for integer-simple

[GHC]

#15915: Add CI for integer-simple
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        Reporter:  bgamari           |                Owner:  bgamari
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:  8.8.1
       Component:  Continuous        |              Version:  8.6.2
  Integration                        |
      Resolution:                    |             Keywords:
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 Ben Gamari <ben@…>):

 In [changeset:"50f0cd4647ffc6300c762375419831a11f8648e6/ghc"
 50f0cd46/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="50f0cd4647ffc6300c762375419831a11f8648e6"
 circleci: Add integer-simple build target

 Fixes #15915.
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15915#comment:4>
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