Modernize and refactor `base.cabal`
Modernize and refactor `base.cabal`

 - removes the redundant `impl(ghc)` conditional
 - unifies the `exposed-modules` list
 - sorts lists alphabetically
 - convert to uniform `,`-less & line-oriented lists
   (helps reduce diff-noise in future)
 - remove obsolete `nhc98-options` field
 - avoid `{}`-style Cabal grammar
 - remove `extensions: CPP`
 - add `category` field to silence Cabal warning
 - add missing entries to `extra-source-files`
   (the source distribution wasn't buildable because of this!)
 - list all occuring `LANGUAGE` pragmas in `other-extensions`
 - explicitly declare `default-language: Haskell2010`

Signed-off-by: Herbert Valerio Riedel <202fbcf3c00694524024feb79f3bb8fc1c4e4f9c@gnu.org>

lukexi/ghc,ezyang/ghc,sdiehl/ghc,GaloisInc/halvm-ghc,da-x/ghc,christiaanb/ghc,ezyang/ghc,green-haskell/ghc,siddhanathan/ghc,oldmanmike/ghc,nkaretnikov/ghc,anton-dessiatov/ghc,wxwxwwxxx/ghc,fmthoma/ghc,siddhanathan/ghc,forked-upstream-packages-for-ghcjs/ghc,mcschroeder/ghc,siddhanathan/ghc,mfine/ghc,shlevy/ghc,tjakway/ghcjvm,olsner/ghc,nkaretnikov/ghc,ghc-android/ghc,ezyang/ghc,ghc-android/ghc,gcampax/ghc,mfine/ghc,ryantm/ghc,shlevy/ghc,bitemyapp/ghc,vTurbine/ghc,sgillespie/ghc,mettekou/ghc,AlexanderPankiv/ghc,acowley/ghc,acowley/ghc,AlexanderPankiv/ghc,vTurbine/ghc,wxwxwwxxx/ghc,frantisekfarka/ghc-dsi,acowley/ghc,nushio3/ghc,forked-upstream-packages-for-ghcjs/ghc,sgillespie/ghc,elieux/ghc,sdiehl/ghc,AlexanderPankiv/ghc,mettekou/ghc,nkaretnikov/ghc,vikraman/ghc,christiaanb/ghc,snoyberg/ghc,urbanslug/ghc,spacekitteh/smcghc,vikraman/ghc,nkaretnikov/ghc,gridaphobe/ghc,tibbe/ghc,da-x/ghc,elieux/ghc,nushio3/ghc,fmthoma/ghc,holzensp/ghc,bitemyapp/ghc,snoyberg/ghc,lukexi/ghc,vTurbine/ghc,jstolarek/ghc,da-x/ghc,olsner/ghc,ml9951/ghc,elieux/ghc,acowley/ghc,christiaanb/ghc,nushio3/ghc,wxwxwwxxx/ghc,ryantm/ghc,mcschroeder/ghc,TomMD/ghc,shlevy/ghc,TomMD/ghc,ryantm/ghc,green-haskell/ghc,lukexi/ghc,nathyong/microghc-ghc,ezyang/ghc,mcschroeder/ghc,urbanslug/ghc,gcampax/ghc,mettekou/ghc,jstolarek/ghc,anton-dessiatov/ghc,forked-upstream-packages-for-ghcjs/ghc,jstolarek/ghc,gridaphobe/ghc,christiaanb/ghc,wxwxwwxxx/ghc,oldmanmike/ghc,olsner/ghc,sdiehl/ghc,nathyong/microghc-ghc,vikraman/ghc,bitemyapp/ghc,olsner/ghc,anton-dessiatov/ghc,AlexanderPankiv/ghc,tjakway/ghcjvm,siddhanathan/ghc,sdiehl/ghc,vTurbine/ghc,ml9951/ghc,vTurbine/ghc,mfine/ghc,urbanslug/ghc,ghc-android/ghc,fmthoma/ghc,frantisekfarka/ghc-dsi,forked-upstream-packages-for-ghcjs/ghc,lukexi/ghc,forked-upstream-packages-for-ghcjs/ghc,elieux/ghc,frantisekfarka/ghc-dsi,holzensp/ghc,da-x/ghc,tjakway/ghcjvm,gcampax/ghc,mfine/ghc,holzensp/ghc,wxwxwwxxx/ghc,mfine/ghc,christiaanb/ghc,acowley/ghc,TomMD/ghc,nathyong/microghc-ghc,bitemyapp/ghc,snoyberg/ghc,tibbe/ghc,sgillespie/ghc,oldmanmike/ghc,gridaphobe/ghc,spacekitteh/smcghc,ml9951/ghc,ghc-android/ghc,gridaphobe/ghc,ryantm/ghc,GaloisInc/halvm-ghc,holzensp/ghc,nathyong/microghc-ghc,forked-upstream-packages-for-ghcjs/ghc,mcschroeder/ghc,siddhanathan/ghc,jstolarek/ghc,urbanslug/ghc,TomMD/ghc,anton-dessiatov/ghc,olsner/ghc,GaloisInc/halvm-ghc,da-x/ghc,christiaanb/ghc,elieux/ghc,mettekou/ghc,vikraman/ghc,anton-dessiatov/ghc,urbanslug/ghc,tjakway/ghcjvm,siddhanathan/ghc,GaloisInc/halvm-ghc,urbanslug/ghc,bitemyapp/ghc,gcampax/ghc,tibbe/ghc,tibbe/ghc,snoyberg/ghc,jstolarek/ghc,nushio3/ghc,oldmanmike/ghc,nkaretnikov/ghc,green-haskell/ghc,vikraman/ghc,gcampax/ghc,sgillespie/ghc,ml9951/ghc,acowley/ghc,gridaphobe/ghc,nathyong/microghc-ghc,christiaanb/ghc,AlexanderPankiv/ghc,ghc-android/ghc,forked-upstream-packages-for-ghcjs/ghc,ghc-android/ghc,ezyang/ghc,AlexanderPankiv/ghc,acowley/ghc,urbanslug/ghc,mcschroeder/ghc,oldmanmike/ghc,fmthoma/ghc,olsner/ghc,mcschroeder/ghc,elieux/ghc,sdiehl/ghc,ghc-android/ghc,vikraman/ghc,shlevy/ghc,TomMD/ghc,spacekitteh/smcghc,nkaretnikov/ghc,gridaphobe/ghc,siddhanathan/ghc,snoyberg/ghc,shlevy/ghc,mettekou/ghc,mettekou/ghc,gcampax/ghc,tjakway/ghcjvm,tjakway/ghcjvm,da-x/ghc,nathyong/microghc-ghc,nkaretnikov/ghc,GaloisInc/halvm-ghc,shlevy/ghc,sdiehl/ghc,oldmanmike/ghc,frantisekfarka/ghc-dsi,green-haskell/ghc,ezyang/ghc,fmthoma/ghc,gcampax/ghc,ml9951/ghc,spacekitteh/smcghc,nushio3/ghc,vTurbine/ghc,ml9951/ghc,holzensp/ghc,olsner/ghc,TomMD/ghc,gridaphobe/ghc,vTurbine/ghc,ml9951/ghc,lukexi/ghc,elieux/ghc,anton-dessiatov/ghc,AlexanderPankiv/ghc,mfine/ghc,tjakway/ghcjvm,sgillespie/ghc,mettekou/ghc,tibbe/ghc,snoyberg/ghc,nushio3/ghc,oldmanmike/ghc,nushio3/ghc,sgillespie/ghc,ryantm/ghc,sdiehl/ghc,frantisekfarka/ghc-dsi,wxwxwwxxx/ghc,snoyberg/ghc,anton-dessiatov/ghc,fmthoma/ghc,green-haskell/ghc,vikraman/ghc,wxwxwwxxx/ghc,shlevy/ghc,sgillespie/ghc,spacekitteh/smcghc,da-x/ghc,fmthoma/ghc,TomMD/ghc,GaloisInc/halvm-ghc,ezyang/ghc,mfine/ghc,GaloisInc/halvm-ghc,ml9951/ghc,mcschroeder/ghc,nathyong/microghc-ghc