Make sure tests can't be forgotten in cabal file

some *Spec.hs files weren't landing in the sdist since they werent
listed in other-modules and since we use hspec-discover no one ever
noticed.

ghc-mod.cabal

@@ -277,21 +277,28 @@ Test-Suite spec
   Type:                 exitcode-stdio-1.0
   Other-Modules:        Paths_ghc_mod
                         Dir
-                        Spec
                         TestUtils
+
+-- $ ls test/*Spec.hs | sed 's_^.*/\(.*\)\.hs$_\1_' | sort
                         BrowseSpec
-                        CustomPackageDbSpec
+                        CabalHelperSpec
+                        CaseSplitSpec
                         CheckSpec
+                        CradleSpec
+                        CustomPackageDbSpec
+                        FileMappingSpec
+                        FindSpec
                         FlagSpec
+                        GhcPkgSpec
+                        HomeModuleGraphSpec
                         InfoSpec
                         LangSpec
                         LintSpec
                         ListSpec
                         MonadSpec
                         PathsAndFilesSpec
-                        HomeModuleGraphSpec
-                        FileMappingSpec
                         ShellParseSpec
+                        TargetSpec
 
   Build-Depends:        hspec             < 2.4  && >= 2.0.0
   X-Build-Depends-Like: CLibName

test/FindSpec.hs

@@ -1,7 +1,7 @@
 {-# LANGUAGE OverloadedStrings #-}
 module FindSpec where
 
-import GhcMod.Find
+import GhcModExe.Find
 import Test.Hspec
 import TestUtils
 

test/Main.hs

@@ -1,5 +1,4 @@
 {-# LANGUAGE CPP, ScopedTypeVariables #-}
-import Spec
 import Dir
 
 import Control.Exception as E
@@ -10,6 +9,48 @@ import System.Environment
 import Test.Hspec
 import TestUtils
 
+import qualified BrowseSpec
+import qualified CabalHelperSpec
+import qualified CaseSplitSpec
+import qualified CheckSpec
+import qualified CradleSpec
+import qualified CustomPackageDbSpec
+import qualified FileMappingSpec
+import qualified FindSpec
+import qualified FlagSpec
+import qualified GhcPkgSpec
+import qualified HomeModuleGraphSpec
+import qualified InfoSpec
+import qualified LangSpec
+import qualified LintSpec
+import qualified ListSpec
+import qualified MonadSpec
+import qualified PathsAndFilesSpec
+import qualified ShellParseSpec
+import qualified TargetSpec
+
+spec :: Spec
+spec = do
+  describe "Browse"          BrowseSpec.spec
+  describe "CabalHelper"     CabalHelperSpec.spec
+  describe "CaseSplit"       CaseSplitSpec.spec
+  describe "Check"           CheckSpec.spec
+  describe "Cradle"          CradleSpec.spec
+  describe "CustomPackageDb" CustomPackageDbSpec.spec
+  describe "FileMapping"     FileMappingSpec.spec
+  describe "Find"            FindSpec.spec
+  describe "Flag"            FlagSpec.spec
+  describe "GhcPkg"          GhcPkgSpec.spec
+  describe "HomeModuleGraph" HomeModuleGraphSpec.spec
+  describe "Info"            InfoSpec.spec
+  describe "Lang"            LangSpec.spec
+  describe "Lint"            LintSpec.spec
+  describe "List"            ListSpec.spec
+  describe "Monad"           MonadSpec.spec
+  describe "PathsAndFiles"   PathsAndFilesSpec.spec
+  describe "ShellParse"      ShellParseSpec.spec
+  describe "Target"          TargetSpec.spec
+
 main :: IO ()
 main = do
 #if __GLASGOW_HASKELL__ >= 708

test/Spec.hs

@@ -1 +0,0 @@
-{-# OPTIONS_GHC -F -pgmF hspec-discover -optF --no-main #-}