[GHC] #15265: Print result summary in test suite when interrupted

[GHC]

#15265: Print result summary in test suite when interrupted
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           Reporter:  osa1           |             Owner:  (none)
               Type:  task           |            Status:  new
           Priority:  lowest         |         Milestone:
          Component:  Test Suite     |           Version:  8.5
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 It'd be helpful if the test runner showed summary of the tests run so far
 when it's interrupted. This is useful when working on new features: I
 sometimes run the test suite only to realize something's broken and I'm
 getting lots of failures. At this point no need to wait until it completes
 so I interrupt the process, but this doesn't print the summary of the
 tests run so far, so I have to use terminal scrollback and manually list
 failing tests etc.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15265>
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