test-context: conditionalize the workingfilectx date printing for Windows

Starting with 13272104bb07, the output changed on Windows:

  --- e:/Projects/hg/tests/test-context.py.out
  +++ e:/Projects/hg/tests/test-context.py.err
  @@ -1,4 +1,4 @@
  -workingfilectx.date = (1000, 0)
  +workingfilectx.date = (1000L, 0)
   ASCII   : Gr?ezi!
   Latin-1 : Grⁿezi!
   UTF-8   : Gr├╝ezi!

Since int and long are both 32 bit on Windows, this seems harmless in practice
other than the previous test failure.

tests/test-context.py

@@ -16,7 +16,11 b" os.utime('foo', (1000, 1000))"
 repo[None].add(['foo'])
 repo.commit(text='commit1', date="0 0")
 
-print "workingfilectx.date =", repo[None]['foo'].date()
+if os.name == 'nt':
+    d = repo[None]['foo'].date()
+    print "workingfilectx.date = (%d, %d)" % (d[0], d[1])
+else:
+    print "workingfilectx.date =", repo[None]['foo'].date()
 
 # test memctx with non-ASCII commit message