win: fix uncaught multiprocess child test failures

test/win/win_multiprocess.cc

Index: test/win/win_multiprocess.cc
diff --git a/test/win/win_multiprocess.cc b/test/win/win_multiprocess.cc
index 1eece13f1cd825bf59907dd1001368956ec93242..126e8b2de58a6155f5099b8456da1891d1225dce 100644
--- a/test/win/win_multiprocess.cc
+++ b/test/win/win_multiprocess.cc
@@ -100,6 +100,9 @@ void WinMultiprocess::Run() {
 
     // Invoke the child side of the test.
     WinMultiprocessChild();
+
+    if (testing::Test::HasFailure())
+      exit(255);
     exit(0);

[erikwright (departed), 2015/06/01 18:54:08]

Should 0 be EXIT_SUCCESS, for consistency with exit_code_'s default value?

[scottmg, 2015/06/01 19:17:04]

Done.

   } else {
     // If we're in the parent, make pipes for child-to-parent and