Fix typos.

Cabal/Distribution/Compat/TempFile.hs

Cabal/Distribution/Make.hs

Cabal/Distribution/PackageDescription.hs

Cabal/Distribution/PackageDescription/Check.hs

Cabal/Distribution/PackageDescription/Configuration.hs

Cabal/Distribution/PackageDescription/Parse.hs

Cabal/Distribution/ParseUtils.hs

Cabal/Distribution/Simple.hs

Cabal/Distribution/Simple/Build.hs

Cabal/Distribution/Simple/Command.hs

Cabal/Distribution/Simple/GHC.hs

Cabal/Distribution/Simple/Haddock.hs

Cabal/Distribution/Simple/HaskellSuite.hs

Cabal/Distribution/Simple/InstallDirs.hs

Cabal/Distribution/Simple/LHC.hs

Cabal/Distribution/Simple/LocalBuildInfo.hs

Cabal/Distribution/Simple/PackageIndex.hs

Cabal/Distribution/Simple/Program.hs

Cabal/Distribution/Simple/Program/Builtin.hs

Cabal/Distribution/Simple/Program/Db.hs