Bug#865819: haskell-hackage-security FTBFS due to build-dependency on libghc-cabal-dev

[Adrian Bunk]

Source: haskell-hackage-security
Version: 0.5.2.2-7
Severity: serious

>From #865399:
haskell-cabal should be kept out of testing for the foreseeable future,
and any packages build-depending on it should be switched to use ghc's
Cabal for the foreseeable future.