Create a package DB for the default compiler in 'sandbox init'.
Create a package DB for the default compiler in 'sandbox init'.

Fixes #1450.

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