Add HsConFieldSpec

compiler/GHC/Hs/Decls.hs

compiler/GHC/Hs/Instances.hs

compiler/GHC/Hs/Type.hs

compiler/GHC/HsToCore/Docs.hs

compiler/GHC/HsToCore/Quote.hs

compiler/GHC/Iface/Ext/Ast.hs

compiler/GHC/Parser.y

compiler/GHC/Parser/PostProcess.hs

compiler/GHC/Parser/PostProcess/Haddock.hs

compiler/GHC/Rename/HsType.hs

compiler/GHC/Rename/Module.hs

compiler/GHC/Tc/Gen/Sig.hs

compiler/GHC/Tc/TyCl.hs

compiler/GHC/ThToHs.hs

compiler/Language/Haskell/Syntax/Decls.hs

compiler/Language/Haskell/Syntax/Type.hs

utils/check-exact/ExactPrint.hs

utils/haddock/haddock-api/src/Haddock/Backends/Hoogle.hs

utils/haddock/haddock-api/src/Haddock/Backends/LaTeX.hs

utils/haddock/haddock-api/src/Haddock/Backends/Xhtml/Decl.hs