[GHC] #10212: The testsuite cleans up hpc files, even if they are part of a test.

[GHC]

#10212: The testsuite cleans up hpc files, even if they are part of a test.
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              Reporter:  dalaing     |             Owner:
                  Type:  bug         |            Status:  new
              Priority:  normal      |         Milestone:
             Component:  Test Suite  |           Version:  7.11
              Keywords:              |  Operating System:  Unknown/Multiple
          Architecture:              |   Type of failure:  None/Unknown
  Unknown/Multiple                   |        Blocked By:
             Test Case:  hpc/T10138  |   Related Tickets:
              Blocking:              |
Differential Revisions:              |
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 Multiple validate runs start to fail hpc/T10138, since the .tix file and
 .hpc directory get cleaned up.

 It seems there are two options here - we could make the test generate the
 .tix file and .hpc directory as it runs, or we could add an option to the
 test driver to not clean those files up for certain tests.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10212>
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