[bug#35859] [PATCH] hackage import: Setup.hs generation and revision support

[Robert Vollmert]

These patches are on top of

https://debbugs.gnu.org/cgi/bugreport.cgi?bug=35812 (fix cabal tests)
https://debbugs.gnu.org/cgi/bugreport.cgi?bug=35846 (braced properties)

- substitute missing Setup.hs and remove manual per-package workarounds
- handle hackage metadata revisions

I believe the code works, but some may not be the most idiomatic scheme
code. Particularly around building the quoted argument list and returning
a pair of cabal data and hash.

0001-gnu-ghc-easy-plot-remove-superfluous-Setup.hs-rename.patch
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0002-guix-haskell-build-system-correct-haddock-phase-docu.patch
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0003-guix-haskell-build-system-generate-Setup.hs-if-not-e.patch
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0004-gnu-haskell-leave-Setup.hs-generation-to-build-syste.patch
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0005-guix-import-hackage-handle-hackage-revisions.patch
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