Replace Prelude.head/tail/init/last with NonEmpty

Cabal/Distribution/Backpack/ComponentsGraph.hs

Cabal/Distribution/Compat/Prelude.hs

Cabal/Distribution/PackageDescription/Check.hs

Cabal/Distribution/Simple.hs

Cabal/Distribution/Simple/Build.hs

Cabal/Distribution/Simple/Configure.hs

Cabal/Distribution/Simple/GHC.hs

Cabal/Distribution/Simple/GHCJS.hs

Cabal/Distribution/Simple/HaskellSuite.hs

Cabal/Distribution/Simple/Program/HcPkg.hs

Cabal/Distribution/Simple/Program/Run.hs

Cabal/Distribution/Simple/UHC.hs

Cabal/Distribution/Types/VersionInterval.hs

Cabal/Distribution/Types/VersionRange.hs

Cabal/Distribution/Utils/Generic.hs

Cabal/Language/Haskell/Extension.hs

Cabal/tests/UnitTests/Distribution/Version.hs

cabal-install/Distribution/Client/CmdInstall.hs

cabal-install/Distribution/Client/CmdRepl.hs

cabal-install/Distribution/Client/HttpUtils.hs