Add a manual testcase for the "not interpreted" issue

test/manual/not-interpreted-error/GhcTestcase.hs

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+-- $ ghc -package ghc -package ghc-paths GhcTestcase.hs
+{-# LANGUAGE ScopedTypeVariables #-}
+module Main where
+
+import GHC
+import GHC.Paths (libdir)
+import DynFlags
+
+import System.Environment
+
+main :: IO ()
+main = do
+  args <- getArgs
+  defaultErrorHandler defaultFatalMessager defaultFlushOut $
+    runGhc (Just libdir) $
+      doStuff "Main.hs" "Main" args
+
+doStuff :: String -> String -> [String] -> Ghc ()
+doStuff targetFile targetModule args = do
+    dflags0 <- getSessionDynFlags
+    let dflags1 = dflags0 {
+        ghcMode   = CompManager
+      , ghcLink   = LinkInMemory
+      , hscTarget = HscInterpreted
+      , optLevel  = 0
+      }
+    (dflags2, _, _) <- parseDynamicFlags dflags1 (map noLoc args)
+    _ <- setSessionDynFlags dflags2
+
+    target <- guessTarget targetFile Nothing
+    setTargets [target { targetAllowObjCode = True }]
+
+    _ <- load LoadAllTargets
+
+    setContext [IIModule $ mkModuleName targetModule]
+
+    return ()

test/manual/not-interpreted-error/proj/Main.hs

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+module Main where
+
+import A
+
+main = print foo

test/manual/not-interpreted-error/proj/not-interpreted-error.cabal

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+name:                not-interpreted-error
+version:             0.1.0.0
+license-file:        LICENSE
+author:              asdf
+maintainer:          asdf
+build-type:          Simple
+cabal-version:       >=1.10
+
+executable main
+  main-is:     Main.hs
+  build-depends:       base
+  default-language:    Haskell2010