[commit: ghc] wip/rae's head updated: Testsuite wibbles around #9200 (b8da952)

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Repository : ssh://git@git.haskell.org/ghc

Branch 'wip/rae' now includes:

     2cca0c0 testsuite: add signal_exit_code function to the driver
     d0ee4eb Update perf number for T5642
     7d52e62 Update Haddock to attoparsec-0.12.1. Adjust perf.
     dff0623 Implement the final change to INCOHERENT from Trac #9242
     ca3fc66 Fix path in cabal file
     77b065b Test #9371 (indexed-types/should_fail/T9371)
     0766407 Fix Trac #9371.
     6c1b709 Comments only: explain that TauTv sometimes gets sigma-types.
     c26714c Remove tcInfExpr (#9404)
     b99d684 Test #9404 (typecheck/should_compile/T9404)
     eb8d8a6 Fix #9415.
     554f08e Test #9415 (typecheck/should_fail/T9415)
     fcc6891 Test #9200. (polykinds/T9200)
     8bbc557 Change definition of CUSK for data and class definitions (#9200).
     24b1791 Added more testing for #9200. (polykinds/T9200b)
     50a5baf Change treatment of CUSKs for synonyms and families (#9200).
     4be9aee Remove NonParametricKinds (#9200)
     ba5c950 Update manual (#9200).
     b8da952 Testsuite wibbles around #9200