[GHC] #12197: test suite: implement a way to run tests with stage1 compiler

[GHC]

#12197: test suite: implement a way to run tests with stage1 compiler
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        Reporter:  osa1              |                Owner:  thomie
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Test Suite        |              Version:
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D2337
       Wiki Page:                    |
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Changes (by thomie):

 * owner:   => thomie
 * differential:   => Phab:D2337
 * component:  Compiler => Test Suite


Comment:

 I implemented option 2 from ticket:10382#comment:21.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12197#comment:1>
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