Modernise System.Exit import in wxc.

Ignore-this: 2bd4fbea71cf7f92e810074bb122b3da
Needed to build with GHC 7.4.1

darcs-hash:20120413161642-db91e-24246ed70835df91671c25733b143b8e227193b3.gz

wxc/Setup.hs

@@ -11,10 +11,10 @@ import Distribution.Simple.Setup (ConfigFlags, BuildFlags, InstallFlags, CopyDes
 import Distribution.Simple.Utils (installOrdinaryFile)
 import Distribution.System (OS (..), Arch (..), buildOS, buildArch)
 import Distribution.Verbosity (normal, verbose)
-import System (ExitCode (..))
 import System.Cmd (system)
 import System.Directory (createDirectoryIfMissing, doesFileExist, getCurrentDirectory, getModificationTime)
 import System.Environment (getEnv)
+import System.Exit (ExitCode (..))
 import System.FilePath.Posix ((</>), (<.>), replaceExtension, takeFileName, dropFileName, addExtension)
 import System.IO.Unsafe (unsafePerformIO)
 import System.Process (readProcess)