fix examples to run process /bin/date well : System.Process uses cmd or command.com shell on Windows, doen't use Cygwin or MSYS shell

examples/makewith/unsafeio/Unsafe.conf.in

@@ -10,7 +10,11 @@ resource = unsafe { field = date }
 -- illustrates the use of the devil's work
 date :: String
 date = unsafePerformIO $ do
+#if !defined(CYGWIN) || !defined(__MINGW32__)
             (_,outh,_,proc) <- runInteractiveProcess "date" [] Nothing Nothing		
+#else
+            (_,outh,_,proc) <- runInteractiveProcess "@PREFIX@/../../bin/date" [] Nothing Nothing		
+#endif
     	    waitForProcess proc
             s <- hGetContents outh
             return s