Paths_ module: don't require base >= 4.
Paths_ module: don't require base >= 4.

Fixes #994.

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