[commit: ghc] wip/rae's head updated: Update .travis.yml to bootstrap with GHC 8.0.2 (e6a2e07)

[git at git.haskell.org]

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

Branch 'wip/rae' now includes:

     a8da0de Speed up compilation of profiling stubs
     b0ed07f Allow TcDerivInfer to compile with GHC 8.0.1
     38260a9 Fix #13972 by producing tidier errors
     039fa1b Suggest how to fix illegally nested foralls in GADT constructor type signatures
     c948b78 Fix #11785 by making reifyKind = reifyType
     af9f3fa Remove extra ` from "kind-indexed GADTs" doc
     03327bf Handle ListPat in isStrictPattern
     36d1b08 Doctest for Void.absurd
     49ddea9 Sections with undefined operators have non-standard behavior
     43b0c2c Insert missing blank line to fix Applicative doc
     63397cb Add some Monoid doctests
     f762181 Mention the category laws explicitly
     a30187d Convert documentation examples to doctests for ReadP module
     bfa9048 Loads of doc(test)s
     2c0ab47 Add missing initial version for extension doc.
     0e1b6f8 Fix index entries in "separate compilation" section
     3385669 user-guide: fix examples of ghci commands
     69a0f01 rts: Enable USDT probes object on Linux
     82ee71f user-guide: add `:type +d` and `:type +v` in release highlight
     dc42c0d Fix #13399 by documenting higher-rank kinds.
     0385347 Remove unneeded reqlibs for mtl and parsec in the GHC testsuite
     c5605ae Make function intToSBigNat# preserve sign (fixes #14085)
     0286214 testsuite: Add test for #13916
     fee253f CSE.cseOneExpr: Set InScopeSet correctly
     6257fb5 Comments about GlobalRdrEnv shadowing
     118efb0 Restrict Lint's complaints about recursive INLINEs somewhat
     698adb5 Tracing in OccAnal (commented out)
     4c6fcd7 Comments only
     61c4246 Test Trac #14110
     f50e30e Doctests for Data.Tuple
     6267d8c Enable -Wcpp-undef for GHC and runtime system
     cf8ab1c users_guide: Convert mkUserGuidePart generation to a Sphinx extension
     8e5b6ec Add strict variant of iterate
     ee2e9ec Correct incorrect free in PE linker
     1cdceb9 Revert "Add strict variant of iterate"
     34bd43d Fix loading of dlls on 32bit windows
     6982ee9 Fix #14125 by normalizing data family instances more aggressively
     a89bb80 Fix #14114 by checking for duplicate vars on pattern synonym RHSes
     79b259a Fix #13885 by freshening reified GADT constructors' universal tyvars
     8476097 Revise function arity mismatch errors involving TypeApplications
     8fd9599 Make the Read instance for Proxy (and friends) ignore precedence
     afc2f79 Move validate cleaning from distclean to clean
     4717ce8 Fix incorrect retypecheck loop in -j (#14075)
     9afaebe StgLint: Allow join point bindings of unlifted type
     cd5a970 Make law for Foldable.length explicit
     20c7053 Bump haddock submodule
     090d896 fix typo (expreesions -> expressions)
     028645c Fixed a typo in template-haskell documentation
     26f78d0 Test #14038 in dependent/should_compile/T14038
     0991b49 Regression test for #12742
     159294f Test #12938 in indexed-types/should_compile/T12938
     56b0c7b Fix #13391 by checking for kind-GADTs
     21b55c1 Fix #13407 by suppressing invisibles better.
     9d92d5f Fix #13909 by tweaking an error message.
     ee34d32 Make rejigConRes do kind substitutions
     63b35af Fix #13929 by adding another levity polymorphism check
     8c3ba69 Test #13938, with expect_broken
     1cf8d52 Fix #13963.
     288427c Fix egregious duplication of vars in RnTypes
     fbb9aa7 Clarify 13963
     7443211 Clarify comments about egregious error
     e6a2e07 Update .travis.yml to bootstrap with GHC 8.0.2