[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 mpickering):

 In particular, the XML produced doesn't look like it follows the schema.

 https://www.ibm.com/support/knowledgecenter/en/SSQ2R2_14.1.0/com.ibm.rsar.analysis.codereview.cobol.doc/topics/cac_useresults_junit.html

 There appear to be a number of missing fields that are required.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15093#comment:5>
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