Never compile boot files

Author: wz1000

ghcide/src/Development/IDE/Core/Rules.hs

@@ -1024,6 +1024,7 @@ getLinkableType f = use_ NeedsCompilation f
 
 -- needsCompilationRule :: Rules ()
 needsCompilationRule :: NormalizedFilePath  -> Action (IdeResultNoDiagnosticsEarlyCutoff (Maybe LinkableType))
+needsCompilationRule file | "boot" `isSuffixOf` (fromNormalizedFilePath file) = pure (Just $ encodeLinkableType Nothing, Just Nothing)
 needsCompilationRule file = do
   graph <- useNoFile GetModuleGraph
   res <- case graph of