[GHC] #15093: Testsuite should output JUnit XML for better CircleCI support

[GHC]

#15093: Testsuite should output JUnit XML for better CircleCI support
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        Reporter:  mpickering        |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.2.2
      Resolution:                    |             Keywords:  CI
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):

 The testsuite driver indeed already has support for this. See
 54d3a1fdeb7044a1d9bb025d4880d08c708b4cd0.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15093#comment:3>
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