In several places we need to know whether any modules in the component being
built use template haskell, because if they do we need to make sure the object
files that will be needed are built.
Previously, we checked whether TemplateHaskell was present in the extensions
declared in the cabal file. Now we also check for QuasiQuotes.

This patch adds usesTemplateHaskellOrQQ to Distribution.Types.BuildInfo and
Distribution.PackageDescription. The checks "doingTH" checks in
Distribuion.Simple.GHC, Distribution.Simple.GHCJS, and Distribution.Simple.LHC
now delegate to usesTemplateHaskellOrQQ rather than each having identical checks
inline.