[commit: ghc] wip/oneShot's head updated: Add oneShot demo file (f9b4c5e)

[git at git.haskell.org]

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

Branch 'wip/oneShot' now includes:

     5f69c8e Reorder GHC.List; fix performance regressions
     f109085 Update Haddock submodule for collapsible section support
     64d0a19 Really fix fft2 regression. #9740
     208a0c2 Fixed unused variable warning on mingw32/i686 in rts/Linker.c
     f9ca529 hsc2hs: Update submodule
     322810e Convert GHCi sources from .lhs to .hs
     257cbec Fix #9236 Error on read from closed handle
     5ce1266 Use snwprintf instead of swprintf in rts/Linker.c.
     acb3295 Avoid setting -Werror=unused-but-set-variable on Windows.
     45175e1 Extra CRs are now filtered out from the source file for :list.
     f10b67a Updated stale ghcpkg05.stderr-mingw32.
     3d27f69 Do not use a relative path for echo in tests/ghci/prog013.
     c211f8e Add __GLASGOW_HASKELL_TH__=YES/NO to CPP definitions
     93c776a Added mingw32-specific expected stdout files for tests/driver/sigof{01,02,03}
     5273cae Put one-Shot info in the interface
     13a1ebe Add GHC.Prim.oneShot
     21d0630 Use oneShot in the definition of foldl etc.
     f9b4c5e Add oneShot demo file