Update tests to accomodate output changes in GHC HEAD.

cabal-testsuite/PackageTests/Backpack/Includes1/setup.test.hs

@@ -5,4 +5,4 @@ main = setupAndCabalTest $ do
     r <- fails $ setup' "build" []
     assertRegex "error should be in B.hs" "^B.hs:" r
     assertRegex "error should be \"Could not find module Data.Set\""
-                "(Could not find module|Failed to load interface).*Data.Set" r
+                "(Could not (load|find) module|Failed to load interface).*Data.Set" r

cabal-testsuite/PackageTests/Backpack/Includes5/setup.test.hs

@@ -4,5 +4,8 @@ main = setupAndCabalTest $ do
     setup "configure" []
     r <- fails $ setup' "build" []
     assertOutputContains "Foobar" r
-    assertOutputContains "Could not find" r
+    assertRegex
+      "error should be about not being able to find a module"
+      "Could not (find|load) module"
+      r
     return ()

cabal-testsuite/PackageTests/BuildDeps/TargetSpecificDeps1/setup.test.hs

@@ -8,4 +8,4 @@ main = setupAndCabalTest $ do
     assertRegex "error should be in MyLibrary.hs" "^MyLibrary.hs:" r
     assertRegex
       "error should be \"Could not find module `Text\\.PrettyPrint\""
-      "(Could not find module|Failed to load interface for).*Text\\.PrettyPrint" r
+      "(Could not (load|find) module|Failed to load interface for).*Text\\.PrettyPrint" r

cabal-testsuite/PackageTests/BuildDeps/TargetSpecificDeps3/setup.test.hs

@@ -8,4 +8,4 @@ main = setupAndCabalTest $ do
     assertRegex "error should be in lemon.hs" "^lemon.hs:" r
     assertRegex
       "error should be \"Could not find module `Text\\.PrettyPrint\""
-      "(Could not find module|Failed to load interface for).*Text\\.PrettyPrint" r
+      "(Could not (load|find) module|Failed to load interface for).*Text\\.PrettyPrint" r