Refine BuildAssumeDepsUpToDate test to start with --assume-deps-up-to-date.

Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>

Cabal/tests/PackageTests/Tests.hs

@@ -414,7 +414,9 @@ tests config = do
     pkg_dir <- packageDir
     liftIO $ writeFile (pkg_dir </> "A.hs") "module A where\na = \"a1\""
     liftIO $ writeFile (pkg_dir </> "myprog/Main.hs") "import A\nmain = print (a ++ \" b1\")"
-    cabal_build []
+    cabal "configure" []
+    cabal "build" ["--assume-deps-up-to-date", "BuildAssumeDepsUpToDate"]
+    cabal "build" ["--assume-deps-up-to-date", "myprog"]
     runExe' "myprog" []
         >>= assertOutputContains "a1 b1"