Do not pass -XHaskell98 to older compilers (fixes #1016)
Do not pass -XHaskell98 to older compilers (fixes #1016)

fugyk/cabal,themoritz/cabal,lukexi/cabal,Heather/cabal,martinvlk/cabal,bennofs/cabal,garetxe/cabal,enolan/cabal,beni55/cabal,seereason/cabal,bennofs/cabal,kosmikus/cabal,themoritz/cabal,plow-technologies/cabal,corngood/cabal,plow-technologies/cabal,Peaker/cabal,sopvop/cabal,garetxe/cabal,mmakowski/cabal,Helkafen/cabal,gbaz/cabal,eric-stanley/cabal,triplepointfive/cabal,sopvop/cabal,anton-dessiatov/cabal,thomie/cabal,martinvlk/cabal,gridaphobe/cabal,Heather/cabal,thomie/cabal,enolan/cabal,mightybyte/cabal,headprogrammingczar/cabal,headprogrammingczar/cabal,ian-ross/cabal,thoughtpolice/cabal,typelead/epm,beni55/cabal,edsko/cabal,sopvop/cabal,randen/cabal,Peaker/cabal,christiaanb/cabal,valderman/cabal,edsko/cabal,thoughtpolice/cabal,kosmikus/cabal,mmakowski/cabal,ian-ross/cabal,themoritz/cabal,mydaum/cabal,mightybyte/cabal,gridaphobe/cabal,seereason/cabal,anton-dessiatov/cabal,typelead/epm,randen/cabal,kolmodin/cabal,corngood/cabal,rimmington/cabal,trskop/cabal,eric-stanley/cabal,plumlife/cabal,fugyk/cabal,mydaum/cabal,plumlife/cabal,fpco/cabal,valderman/cabal,x-y-z/cabal,christiaanb/cabal,Helkafen/cabal,lukexi/cabal,gbaz/cabal,triplepointfive/cabal,ghc-android/cabal,trskop/cabal,rimmington/cabal,ghc-android/cabal,fpco/cabal,x-y-z/cabal,kolmodin/cabal