[commit: ghc] wip/new-flatten-skolems-Aug14's head updated: Merge commit with origin/master (c4eb017)

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

Branch 'wip/new-flatten-skolems-Aug14' now includes:

     a477e81 Avoid printing uniques in specialization rules
     0e2bd03 Update T6056 output
     1c35f9f rts: fix unused parameter warning
     612f3d1 Implement optimized NCG `MO_Ctz W64` op for i386 (#9340)
     7369d25 Remove obsolete Data.OldTypeable (#9639)
     ce23745 Generalise `Control.Monad.{foldM,foldM_}` to `Foldable` (#9586)
     abfbb0d Remove redundant explicit `Prelude` imports
     d576fc3 Python 3 support, second attempt (Trac #9184)
     b5930f8 Refactor module imports in base
     5b9fe33 Indentation and non-semantic changes only.
     4d90b53 Sync up `containers` submodule to latest `master`-tip
     07da36b Revert "Fix typo in section name: no leading period."
     0202b7c Revert "Check for staticclosures section in Windows linker."
     89a8d81 Revert "Rename _closure to _static_closure, apply naming consistently."
     126b0c4 Revert "Properly generate info tables for static closures in C--."
     a3860fc Revert "BC-breaking changes to C-- CLOSURE syntax."
     d5d6fb3 Revert "Place static closures in their own section."
     47c4c91 Update Haddock submodule
     07a99c1 Revert "rts/PrimOps.cmm: follow '_static_closure' update"
     f681c32 Test #9692 in th/T9692
     2cd80ba Clarify location of Note. Comment change only.
     e319d6d Reify data family instances correctly.
     c4eb017 Merge commit with origin/master