[GHC] #15137: Install the "primitive" package on CI before running tests

[GHC]

#15137: Install the "primitive" package on CI before running tests
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        Reporter:  osa1              |                Owner:  (none)
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.5
      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 bgamari):

 It looks to me like the failure in comment:2 is rather orthogonal to this
 ticket. Rather the failure is due to this test's rather peculiar use of
 `find`. Patch coming to fix this.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15137#comment:3>
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