Don't use -dylib-install-name on OS X with GHC > 7.8.
Don't use -dylib-install-name on OS X with GHC > 7.8.

Fixes #1660. Based on a patch by Christiaan Baaij.

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